Moog slimphatty Operating instructions

Moog slimphatty Operating instructions
Table of Contents
FOREWORD from Steve Dunnington ..................
THE BASICS
How to use this Manual .......................................
Setup and Connections ........................................
Overview and Features ........................................
Signal Flow ....................................................................
Basic Operation .........................................................
6
6
8
10
11
THE COMPONENTS
A. Oscillator Section ...............................................
B. Filter Section .........................................................
C. Envelope Generators Section ....................
D. Modulation Section ..........................................
E. Output Section ....................................................
F. Input/Output Panel ............................................
G. Interface Panel .....................................................
12
14
16
18
19
20
21
THE USER INTERFACE
Preset Mode ................................................................
Master Mode ...............................................................
A. Menus ....................................................
B. Advanced Presets ...........................
C. System Exclusive .............................
D. System Utilities..................................
5
23
26
26
36
42
45
THE USER INTERFACE (con’t)
Performance Sets ................................................................
Activating the Arpeggiator and Latch ....................
How the SP handles MIDI .............................................
50
52
54
APPENDICES
A – LFO Sync Modes .....................................................
B – Arpeggiator Clock Source ..................................
C – The Calibration Preset .........................................
D – Accessories .................................................................
E – Tutorial .............................................................................
F – MIDI Implementation Chart ..............................
G – Service & Support Information ........................
H – Caring for the Slim Phatty ...................................
I – Using the CP-251 with the Slim Phatty .........
J – Specifications .................................................................
58
59
60
61
62
67
68
68
69
71
GLOSSARY ......................................................................................
72
SLIM PHATTY PRESET LIST ................................................
76
Page
3
SAFETY INFORMATION
*** Important Safety Instructions - Please Read ***
WARNING - When using electric products, basic precautions should always be followed, including the
following:
1) Read all the instructions before using the product.
2) Do not use this product near water – for example, near a bathtub, washbowl, kitchen sink, in a wet
basement, or near a swimming pool or the like.
3) This product should be used only with a car t or stand that is recommended by the manufacturer.
4) This product, in combination with an amplifier and headphones or speakers, may be capable of
producing sound levels that could cause permanent hearing loss. Do not operate for a long period of time
at a high volume level or at a level that is uncomfor table. If you experience any hearing loss or ringing in
your ears, you should consult an audiologist.
5) The product should be located so that its location does not interfere with its proper ventilation.
6) The product should be located away from heat sources such as radiators, heat registers, or other products that
produce heat.
7) The product should be connected to a power supply only of the type described in the operating instructions or as
marked on the product.
8) The power supply cord of the product should be unplugged from the outlet when left unused for a
long period of time.
9) Care should be taken so that objects do not fall upon and liquids are not spilled into the keyboard or
front panel.
10) The product should be ser viced by qualified personnel when:
a) The power supply cord or the plug has been damaged
b) Objects have fallen, or liquid has been spilled onto the product
c) The product has been exposed to rain
d) The product does not appear to operate normally or exhibits a marked change in performance
e) The product has been dropped or the enclosure damaged.
11) Do not attempt to service the product beyond that described in the user-maintenance instructions.
All other ser vicing should be referred to qualified service personnel.
DANGER – INSTRUCTIONS PERTAINING TO RISK OF FIRE, ELECTRIC SHOCK, OR INJURY TO PERSONS:
Do not open the chassis. There are no user serviceable parts inside. Refer all servicing to qualified personnel only.
GROUNDING INSTRUCTIONS: This product must be grounded. If it should malfunction or
breakdown, grounding provides a path of least resistance for electrical current to reduce the risk
of electric shock. This product is equipped with a cord having an equipment grounding connector and
a grounding plug. The plug must be plugged into an appropriate outlet that is properly installed and
grounded in accordance with all local codes and ordinances.
DANGER – Improper connection of the equipment-grounding connector can result in a risk of electric shock.
Check with a qualified electrician or serviceman if you are in doubt as to whether the product is properly
grounded. Do not modify the plug provided with this product – if it will not fit in the outlet, have a proper outlet
installed by a qualified electrician.
FOREWORD
Foreword
We here at Moog Music are grateful that you have chosen the Slim Phatty® analog synthesizer for your musical
pursuits, and hope you find it to be an inspiring instrument for years to come.
Good things can come in small packages – and “the Slim” is no exception. Making the Slim Phatty has been a
labor of love, transforming the electronic workings of the Little Phatty® into a package that is easily used as a
desktop or a 3U rack-mount unit. Its small stature doesn’t take away from the massive sounds it can produce. This
should come as no surprise as it is a direct descendant of the Little Phatty, Minimoog Voyager®, as well as the
original Minimoog® Model D synthesizers. These are all instruments that bear the stamp of Bob Moog’s creative
genius for designing analog synthesizer technology with soul. It is our honor and pleasure to bear his torch forward
into the future.
I’d like to thank the team who helped bring this instrument from the drawing board to reality: Cyril Lance, Amos
Gaynes, Rick Shaich, Eric Church, Dean Cavnaugh, Chris Stack, and of course, our fearless leader, Mike Adams.
Special thanks are due to Greg Kist who authored this fine manual. Also, thanks to you, our customer, for using
our products and pushing the boundaries of music forward. Finally I’d like to pay tribute to my friend, Bob Moog.
We remember you not only for your genius as an instrument designer, but for your genius at living with passion,
generosity, humility, and mirth.
The only thing more gratifying than making excellent musical tools for our customers is hearing what they think
of our instruments and hearing the music they create. Take a moment to register your Slim Phatty’s warranty.
This can be done either on our website Moogmusic.com, or by regular mail with the enclosed warranty card. Visit
our website to learn the latest information about the Slim, and our other products, many of which make great
playmates for your new instrument. Our forum is filled with enthusiasts who are always willing to share knowledge,
tips, ideas, and music with their fellow forum members. It is a remarkable on-line community. If you have a
moment, drop us a line and let us know how you are enjoying your Slim Phatty.
Most important – make some music!
May your sonic adventures with your Slim Phatty be full of discovery and enjoyment.
Steve Dunnington
Product Development Specialist
Moog Music Inc.
Slim
Phatty
User’s
Manual
-­
The
Basics
THE BASICS
How to Use this Manual
The Setup and Connections section explains how to unpack, setup and connect the Slim Phatty, and provides
a quick start to get you up and running with your new synthesizer.
The Components section offers detailed explanations of the components that create and modify sound.
First time users should check out the Tutorial in Appendix E, where you will find an explanation of sound
and subtractive synthesis.
For those interested MIDI interface specifics, see the section titled How the SP handles MIDI (page 54), as
well as the MIDI Implementation Chart, which appears in Appendix F.
Throughout the manual you will see icons that point out additional information:
This icon indicates an important note concerning the operation of the Slim Phatty.
This icon indicates a useful performance or programming tip.
This icon indicates technical information for the advanced user or the technically curious.
Setup and Connections
For those of you who can’t wait to play your new Slim Phatty, the following should get you set up and running quickly.
NOTE:
We
encourage
you
to
read
the
entire
manual
at
some
point
to
learn
more
about
the
instrument
and
gain
a
better
understanding
of
what
you
can
do
with
the
Slim
Phatty.
Check the contents in the shipping carton
The Slim Phatty is shipped with the following items:
1.
2.
3.
4.
The Slim Phatty Synthesizer
Power cord
CD-ROM containing this User’s Manual & extras
Warranty registration card
What you will need
In addition to the Slim Phatty and provided accessories, you will need:
1.
2.
3.
4.
5.
Page
6
A sturdy surface to support the Slim Phatty
A MIDI keyboard or MIDI controller
A MIDI cable
A USB cable to connect the Slim Phatty to a host computer for using USB MIDI
A ¼” instrument cable and amplifier, or a pair of headphones
Slim Phatty User’s Manual - The Basics
Set up
Make sure you have an adequate place to set up. Do not expose your Slim Phatty to dripping or splashing and no
objects filled with liquids, such as vases, should be placed on top of it.” Use care when unpacking the Slim Phatty,
and be sure to save the carton and all packing material in case you need to ship the Slim Phatty for any reason.
Connect to Power & MIDI
Connect the Slim Phatty’s power receptacle to a properly-wired wall outlet using the supplied AC power cord.
Warning: An apparatus with CLASS I construction (such as this device) shall be connected to a MAINS socket
outlet with a protective earthing connection. The Slim Phatty's universal power supply will operate with a power
source from 100 to 250 Volts AC, 50/60Hz, 12-16W. Using a standard MIDI cable, make the connection between
the MIDI OUT of your MIDI controller and the MIDI IN on the Slim Phatty. As shipped from the factory, the Slim
Phatty is set to receive messages on MIDI Channel 1. If you are using USB MIDI with a Windows or Macintosh
computer, connect the USB cable from the Slim Phatty to a USB port on your computer. Once the SP’s USB drivers
are automatically installed, the SP will appear as a ‘USB Audio Device’ in the MIDI Device selection options of the
computer’s MIDI software.
Power up
Apply power to the Slim Phatty and your MIDI controller. You will see the LCD screen on the Slim Phatty light
up and display the message:
Slim Phatty
Version X.x
After a few seconds the start-up screen will disappear and the current preset will appear in the display. The
PRESET button will be illuminated in red, the name of the current preset location and preset name will be
displayed on the top line of the LCD screen, and the message ‘PRESET ACTIVE’ will be displayed on the lower
line of the LCD screen.
Connect to
Set the Slim Phatty’s Volume control to minimum before connecting to an ampli er or headphones. Adjust the
ampli er level for a comfortable listening level, and then slowly bring up the Slim Phatty’s volume. Make sure the
OUTPUT ON/OFF switch is illuminated – this means the output is turned on.
Start Playing
Use the VALUE knob to scroll through the presets. All preset locations (00 – 99) are loaded with sounds from
the factory. There are a total of 100 locations in memory for presets – all are user programmable. Note that
once a preset is called up, you can tweak the parameters to your liking using the front panel controls. Any
changes made to the current preset will cause the PRESET button to change its illumination from red to amber,
and the lower line of the LCD screen will change to ‘PANEL ACTIVE’. If you make changes to a preset and want
to return to the original sound, press PRESET. You can toggle between the stored preset and the current edited
preset by pressing the PRESET button until you change presets. If you wish to save your changes – refer to the
section on Storing Presets on page 24. Any changes made to a preset will be lost if they are not saved once you
change to a new preset.
Warranty registration
Moog’s on-line warranty registration system is the best way to activate your warranty. Access the Moog
web site at www.moogmusic.com and click on the “Product Register” tab. If you complete all the requested
information, Moog Music will send you a complimentary gift.
NOTE: It is recommended that a warm up period of about 15 minutes be allowed before using the SP
The SP’s VCOs use a heated chip design that take a short time to warm up. The warm up period may
.
be longer if the SP has been stored outside the recommended operating temperature range.
The Slim Phatty is recommended for an operating temperature between about 50 and 100 degrees
Fahrenheit. It is safe to operate the synthesizer outside of this range (between 0 and 125 degrees F),
but the SP’s voltage controlled oscillators (VCOs) may not remain in tune. It is recommended that
the SP’s case not be exposed to direct sunlight while operating the unit as the tuning of the VCOs
may be affected.
Page 7
Slim
Phatty
User’s
Manual
-­
The
Basics
Overview and Features
The Slim Phatty (SP for short) is a monophonic analog synthesizer that is a descendant of the classic Minimoog
Model D. The SP features 2 ultra-stable oscillators, a genuine Moog 24dB/Octave low pass filter, two 4-stage
analog envelope generators and a flexible modulation matrix. The SP’s front panel has four variable-function
edit controls for real time adjustment of the Modulation, Oscillator, Filter and Envelope Generator parameters,
plus dedicated controls for Fine Tuning, Octave Switching, Glide, and Volume. The User Interface section has
the controls for Preset selection and management, adjustment of global parameters, and System Exclusive MIDI
function and utilities. The SP features 100 factory preset sounds, which can be modified or replaced by your
own sounds.
Here’s a brief description of the front panel components.
Front Panel:
1. The LCD display and User Interface - provides controls to access the presets, the arpeggiator, and
other software functions. The Fine Tune control is located here, along with switches for Glide On/Off
and Octave transpose.
2. The Modulation section - features a programmable modulation matrix. The Modulation section has
controls to select the modulation Source (LFO Triangle, LFO Square, LFO Sawtooth, LFO Ramp,
Filter EG or Oscillator 2) the LFO Rate, the modulation Destination (Pitch, Filter, Waveform or
Oscillator 2) and the modulation Amount parameters. Pressing and holding the AMOUNT switch
enables the MODULATION control knob to act as a MOD WHEEL control.
3. The Oscillators section - features two analog oscillators, each with individual Octave, Level and Waveform controls. Additional controls are provided for tuning the second oscillator relative to the first,
setting the Glide Rate, and engaging Oscillator Hard Sync. The oscillator outputs are summed together
along with the External Audio Input and routed to the Filter section.
4. The Filter section - features the classic Moog 24dB/Octave ‘ladder filter’, and includes controls for
adjusting Cutoff Frequency, Resonance, Keyboard Amount, Envelope Amount, and Overload. The output
of the Filter is routed to the output Voltage Controlled Amplifier (VCA), which is controlled by the
Volume Envelope Generator.
Page
8
Slim
Phatty
User’s
Manual
-­
The
Basics
Front Panel (con’t):
5. The Envelope Generator (EG) section - contains two ADSR-style envelopes, one for the Filter and one
for the Volume. The EG section includes controls for adjusting the Attack, Decay, Sustain and Release
parameters of each envelope.
6. The Output section - includes controls for adjusting the Master Volume, and a switch to toggle the
Audio output on and off. The Master Volume control simultaneously adjusts the levels of both the
Audio output and the Headphone output on the back panel.
Back Panel:
The back panel provides connections for Power, MIDI, Control Voltage Input and Audio I/O.
1. MIDI USB - provides MIDI Input/Output to other MIDI devices through a standard USB ‘Type B’
connection.
2. Audio jacks – provides monophonic Audio Input and Output connections, as well as a Headphone
output. The Audio Input jack allows external signals to be processed by the Slim Phatty.
3. Control Voltage jacks – provides Control Voltage/Expression Pedal inputs for Pitch, Filter, and Volume
parameters, and a keyboard Gate input to trigger the envelope generators with a footswitch or gate
signal. These inputs allow the SP to be controlled from an EP2 expression pedal, MP-201 Multi-Pedal,
Etherwave Plus Theremin, or CV devices like the Moogerfooger® CP-251 Control Processor.
4. MIDI - provides MIDI Input/Output/Thru to other MIDI devices through standard MIDI DIN
connections.
5. Power Socket and Switch – provides power to the SP.
Page
9
Slim
Phatty
User’s
Manual
-­
The
Basics
Signal Flow
To understand the operation of the Slim Phatty, refer to the diagram below. The diagram shows the flow of
the audio, control voltage and modulation signals in the Slim Phatty. Heavy lines are used to indicate audio
signals, which flow from left to right. Lighter lines indicate the control voltages (CV’s), which flow from the
top and bottom. Dotted lines indicate programmable modulation routings.
As the diagram shows, the SP’s source signals are created by two voltage-controlled oscillators which are
mixed together along with the external audio input. The combined audio signal is passed to the low-pass
filter, where the tone is sculpted according to the settings of the filter parameters and the Filter ADSR envelope. The signal then passes to the amplifier stage, where the Volume ADSR envelope shapes it. Finally, the
signal is routed to the output section, where the final level is set by the Master Volume control.
For many users, MIDI will be the main source of control for the Slim Phatty. Each time the SP receives a
MIDI ‘Note On’ command, the SP produces a Pitch CV and Gate signal in response. The Pitch CV signal is
used to specify the pitch of the oscillators, while the Gate signal is used to simultaneously trigger the Filter
and Volume Envelope Generators.
The SP can also be operated via CV and Gate trigger connections, providing for a more ‘old school’ method
of control.
Page
10
Slim
Phatty
User’s
Manual
-­
The
Basics
Basic Operation
The SP has two operating modes: Master and Preset.
• Master mode allows you to access and change global parameters and other utility options.
A complete list of the Master mode functions and parameters is shown on page 26.
• Preset mode allows you to access the presets and manipulate the sound from the front panel
controls. The Preset mode is the main operating mode for editing and playing the SP. Information
on Preset mode is found on page 23.
When the SP is powered on, it starts up in Preset mode. In this
mode, you select presets using the VALUE encoder. You can rotate
the VALUE encoder to step through the presets in either direction.
Pressing the encoder while rotating increments the preset selection
by +10 or -10 presets. In Preset mode, you’ll see the current preset
displayed on the top line of the LCD display, and a ‘Preset Active’
message on the bottom line. The PRESET button is illuminated in
red. When you edit a preset, the bottom line of the display changes
to ‘Panel Active’ and the PRESET button changes from red to amber,
indicating that you are editing the preset sound. By pressing the
PRESET button you can toggle between the preset (stored) and
edited (panel) sounds. Note that once you change preset numbers,
any edits made to the previous preset will be lost unless the edits
are saved.
Editing a preset is simple. There are four analog editing controls on the front
panel, one for each of the four sound shaping sections (Modulation, Oscillators, Filter, and Envelope Generators). Each control is surrounded by a ring of
15 LEDs that indicate approximately the stored or edited value of the current
parameter. The parameters for each section are chosen by pushing the switch
for the desired parameter in that section. That switch then becomes illuminated.
Only one parameter can be activated at a time for editing in each section.
Some parameters offer multiple selections (such as the Modulation SOURCE
switch, shown at right). Pressing that switch advances through the six possible
Modulation sources. For the On/Off type switches like GLIDE ON/OFF (above),
1-2 SYNC or OUTPUT ON/OFF, the switch is illuminated when the parameter
is turned on, and goes out when the parameter is turned off.
TECH
NOTE:
The
SP’s
editing
controls
are
actually
analog
potentiometers.
When
certain
key
parameters
are
selected,
the
analog
control
signal
is
switched
to
control
that
parameter
directly.
This
is
called
RAC™
(Real
Analog
Control).
RAC
gives
the
SP
a
responsiveness
that
can
only
be
achieved
with
analog
control
by
providing
direct
access
to
the
analog
control
signal
path;
straight
to
the
synthesizer
circuits.
RAC
provides
responsive
analog
control
for
the
Osc
1
&
2,
Filter
Cutoff,
Filter
Resonance,
EG
Amount,
Overload
and
Filter
EG
Sustain
parameters.
Page
11
Slim
Phatty
User’s
Manual
-­
The
Components
THE COMPONENTS
The Components
Now let’s take a look at the individual module components that make up the Slim Phatty Synthesizer, starting with the Oscillator section and moving right across the front panel, explaining the features and functions
of the Filter, Envelope Generator and Output sections. Then we’ll cover the Modulation section, the Input/
Output Back Panel, and the User Interface section.
A. The Oscillator Section
The Oscillators are the main sound source of the Slim Phatty. The oscillators in the SP are analog Voltage
Controlled Oscillators (VCOs) that feature a temperature regulation circuit that provides them with excellent tuning stability. The SP’s VCOs can produce a total musical range of 9 octaves!
Oscillator One serves as a master oscillator to which Oscillator 2 is
tuned. The timbres of the oscillators are adjusted by their variable
waveform (WAVE) controls. There is also a switch for syncing Oscillator 2 to Oscillator 1, and a control for adjusting the glide rate which is
explained below.
The frequencies of the oscillators are controlled and affected by a
number of sources. The main control source is a ‘NOTE ON’ command transmitted from an external MIDI controller. The MIDI ‘NOTE
ON’ command is translated into a Control Voltage (CV) that allows
the oscillators to be played in an equal tempered scale. Adding to
that, the SP’s glide circuit can be switched on to slow the CV changes
between notes, resulting in portamento. The CV is then mixed with
the Octave switch CV, the Frequency offset control (Oscillator 2), the
Pitch CV In (if plugged in on the back panel), the fine tune control, and
the output of the Mod Matrix when the “Pitch” destination is selected.
Oscillator Section Controls:
Octave:
Each Oscillator has a switch labeled OCTAVE that selects the relative frequency range. To select the octave,
simply press the switch. Each press of the switch advances the setting, as indicated by the corresponding
LED. When the topmost octave is reached, the next button press cycles back to the lowest octave. The
panel markings 16’, 8’, 4’ and 2’ are octave standards based on organ stops. On the 16’ setting the highest A
on the keyboard is A440.
Oscillator Level:
Each oscillator has a switch labeled LEVEL that allows the analog edit control to adjust the oscillator level.
This allows you to control the relative strength of each oscillator in the mixer from 0 to 100%.
Page
12
Slim
Phatty
User’s
Manual
-­
The
Components
Waveform:
Each oscillator has a switch labeled WAVE that allows the analog edit control to modify the waveform.
The waveform is continuously variable from triangle, to sawtooth, to square, to rectangular. The waveform
is morphed gradually from one to another as the value control is rotated. The legend around the analog
edit control for the oscillator section indicates the knob positions to obtain the triangle, sawtooth, square
and skinniest pulse waveforms. Because the waveform is voltage controlled, this parameter can be modulated. This allows the generation of some very interesting timbral
changes. By limiting the modulation between the square and thin
rectangle (pulse) waves, you can get pulse width modulation, a classic
analog synthesizer sound. Although the waveforms can be set from
the front panel individually for each oscillator, modulation is applied
to both waveform controls simultaneously. When modulation is
applied, it is possible to make the width of the rectangular wave so
skinny that it becomes silent.
Frequency:
Oscillator 2 has a switch labeled FREQ that allows the analog edit control to adjust the frequency
of Oscillator 2 relative to Oscillator 1. The pitch of Oscillator 2 can be adjusted up or down 7 semitones
(± a fifth). By changing the pitch of Oscillator 2, more than one frequency can be played when a key is
pressed, creating intervals for large adjustments, or to get a chorus sound when the oscillators are just
slightly out of tune. Note that Oscillator 1 does not have a frequency control because it is designed to
serve as a reference oscillator.
Sync:
In the center of the oscillator panel is a switch labeled 1–2 SYNC. This is simply an ON/OFF type switch
that has no interaction with the analog edit control. Sync is ON when the 1-2 SYNC switch is lit. With
sync on, Oscillator 2 is synchronized (hard synced) to Oscillator 1, forcing Oscillator 2 to restart its waveform from the beginning each time Oscillator 1 starts a new waveform cycle. The effect is noticeable if the synced Oscillator is a higher
frequency than the Reset Oscillator. The main frequency heard is
that of the reset oscillator. As the frequency of the synced oscillator
is swept, it reinforces the harmonics of the reset oscillator. Use the
Oscillator 2 Frequency control to hear this effect. Depending on
how it is applied, the effect can be aggressive or warm and vocal.
Glide Rate:
In the center of the oscillator panel is a switch labeled GLIDE. When this is selected, the analog edit control
is used to set the glide rate (portamento) between notes. A Glide switch on the User Interface panel (on
the far left) turns the Glide effect on or off. Glide is the time it takes to go from one note to the next. The
glide rate can vary from virtually instantaneous to a very slow glide (about 5 seconds to go from the lowest
C to the highest C on the keyboard).
Additional CV control:
The PITCH jack on the back panel is a CV input for external control of the oscillator pitch. This input
controls the frequencies of both oscillators. A 1-volt change of this voltage will change the pitch by
NOMINALLY one octave. The jack accepts -5 to +5 volts, or an expression pedal like the EP-2.
PERFORMANCE
TIP:
A
steady
control
voltage
applied
to
the
PITCH
jack
will
offset
the
base
pitch
of
both
oscillators.
You
can
use
this
feature
to
transpose
the
keyboard
to
any
desired
interval
applying
the
appropriate
steady-­state
CV.
See
Appendix
J
for
more
information
on
how
to
configure
this.
Page
13
Slim
Phatty
User’s
Manual
-­
The
Components
B. The Filter Section
Filters are used for adjusting the timbre of an audio signal. Filters modify sound by
attenuating some frequencies while allowing others to pass through unaffected. An
important term to understand regarding filters is “Cutoff Frequency”. This is the
point at which frequencies begin to be rejected. The SP features a lowpass filter,
which behaves as its name indicates: it allows low frequencies to pass and rejects
high frequencies.
Another important aspect of filters is the cutoff slope. The cutoff slope defines
how well the filter rejects signals above the cutoff frequency. The cutoff slope is
measured in decibels per octave (dB/Octave), and is always specified as a multiple
of six. A 6dB/Octave slope–the simplest possible filter design–exhibits a gentle
roll-off with a minimum rejection of frequencies above the cutoff. By comparison, a
12dB/Octave slope is twice as steep, and rejects frequencies above the cutoff twice
as much. An 18dB/Octave slope is steeper still, with a corresponding frequency
rejection. Finally, a 24dB/Octave slope provides the steepest rejection of frequencies above the cutoff point. The classic Moog ‘ladder’ filter is a 24dB/Octave
lowpass filter.
The Moog filter also features a parameter called Resonance. This
parameter adds a resonant peak at the cutoff frequency. When the
resonant peak passes through the overtones of the sound being
filtered, those overtones are reinforced. This gives the filter a character that can sound nasal, buzzy, raspy, etc., depending on how it’s used.
When the resonance is turned up past about 3 o’clock on the dial, the
filter begins to self-oscillate at the cutoff frequency, producing a sine
wave tone.
Other filter section controls include Keyboard Amount (KB), Envelope
Generator Amount (EG) and Overload (O.L)
The KB parameter allows you to set the degree to which the filter cutoff frequency tracks the note that
is played. For example, when KB is set to it’s highest level (100%), the filter cutoff will rise by an octave
each time you play an octave higher on the keyboard. This setting allows you to maintain a consistent filter
tone regardless of whether you play low or high on the keyboard. When KB is set to zero, the filter cutoff
remains at the value determined by the analog edit control, regardless of where you play on the keyboard.
This can make the sound less bright as you play higher up on the keyboard. The KB parameter includes the
keyboard GLIDE control signal, which allows the filter cutoff to follow the glide of the notes being played
(when GLIDE is switched ON). Using the KB control, you can adjust the amount of Glide that will affect the
filter cutoff.
The EG parameter allows you to set the degree to which the Filter EG affects the filter cutoff frequency.
The EG parameter is bi-polar, meaning the Filter EG can affect the filter cutoff either in a positive or negative
manner. A positive EG amount will raise the cutoff frequency, while a negative EG amount will lower it.
Page
14
Slim
Phatty
User’s
Manual
-­
The
Components
Finally, the Overload (O.L.) parameter allows you to set the amount of signal clipping from none to soft to
hard clipping as the amount is increased. The results you get with Overload will depend on the settings of
the oscillator waves and levels, and the filter cutoff and the filter resonance settings in addition to Overload
amount. Note that Overload is not the same distortion you’d get from a fuzz box. It can be quite subtly applied to add just a touch of ‘bite’, or aggressively applied to add a jagged edginess to the sound.
Filter Section controls:
Cutoff:
When the CUTOFF switch is selected, the analog edit control is used to adjust the filter cutoff frequency.
The cutoff frequency is adjustable from about 20 Hz to 16 Khz. As the edit control is rotated clockwise, the
cutoff frequency is increased, allowing more of the signal harmonics to pass through the filter.
Resonance (RES):
When the RES switch is selected, the analog edit control is used to adjust the filter resonance. Resonance
causes feedback in the filter circuit, adding harmonic emphasis at the cutoff frequency. When the Resonance
control is all the way down, the lowpass filter acts basically as a tone control, rolling off the high end of the
signal as the Cutoff control is turned down. As Resonance is increased, the filter begins to form a peak at
the cutoff frequency. This emphasizes harmonics near the cutoff frequency, and can result in a ‘wah-wah’ effect when resonance is set fairly high and the filter cutoff is varied. As the resonance is turned up the peak
increases in strength until it begins to self-oscillate – creating a sine wave with the same frequency as the
cutoff frequency.
Keyboard Control Amount (KB):
When the KB switch is selected, the analog edit control is used to adjust the amount of post-glide keyboard
voltage that is routed to the filter cutoff frequency. When the edit control is rotated fully clockwise, the filter
cutoff follows the key played on the keyboard. A higher key will cause a higher cutoff frequency. This allows
a sound to retain its brightness as it is played higher on the keyboard.
Envelope Generator Amount (EG):
When the EG switch is selected, the analog edit control adjusts the amount of the Filter Envelope Generator output that affects the filter cutoff. The Envelope Generator Amount is bi-polar, as indicated by the
legend on the panel, so the amount is 0 when the edit control dial is at the 12 o’clock position. Rotating the
control CW from that point adds a positive EG amount to the filter cutoff, while rotating the control CCW
from that point adds a negative amount to the filter cutoff.
Overload (O.L):
When the O.L. switch is selected, the analog edit control adjusts the amount of pre-filter and post-filter clipping. Overload can be used to warm up sounds and give them a distinctive tonal edge. Advancing the edit
control increases the amount of clipping from the subtle warmth of soft clipping to the ‘growl’ provided by
the beginnings of hard clipping. When set to 100%, Overload adds a volume boost of about +6dB.
Additional CV control:
The FILTER jack on the back panel is a CV input for external control of the filter cutoff parameter. The jack
accepts -5 to +5 volts, or an expression pedal like the EP-2. A voltage applied to this jack is added to the
setting of the filter cutoff control. A one-volt change in the control voltage will change the cutoff frequency
of the filter by about one octave.
Page
15
Slim
Phatty
User’s
Manual
-­
The
Components
TECH
NOTES:
1.
The
SP’s
Overload
circuit
uses
asymmetrical
clipping,
which
clips
each
side
of
the
waveform
differently.
Asymmetrical
clipping
circuits
tend
to
produce
tones
with
unique
richness
and
character.
2.
The
Overload
circuit
has
no
effect
on
the
sound
when
the
analog
edit
control
is
set
fully
counter-­
clockwise.
Advancing
the
control
gradually
introduces
the
effect,
starting
with
a
gentle
overdrive-­like
quality
that
becomes
increasingly
aggressive
and
edgy
as
the
control
reaches
100%.
Because
the
Overload
uses
clipping,
some
sounds,
such
as
a
square
wave
with
the
filter
cutoff
all
the
way
up,
aren’t
affected
much
by
increasing
the
Overload
amount.
Try
sounds
tuned
to
intervals
other
than
unison,
and
a
slightly
resonant
filter
setting
to
really
hear
the
effect.
3.
The
name
“Overload”
came
from
the
Overload
indicator
on
the
Minimoog,
where
if
the
output
was
patched
back
into
the
audio
input
the
Overload
indicator
would
go
on.
Mixing
the
Audio
in
would
provide
a
“fatter”
sound
by
increasing
the
level
of
signal
coming
out
of
the
mixer
and
going
into
the
filter.
C. The Envelope Generators Section
Musical sounds have a start, a middle and an end. For example, a plucked
string sound starts with an initial burst of energy and then slowly fades out
until it is silent. In synthesis terms, this progression is called an envelope – a
shape that defines the changes that occur in a sound over time. An envelope
can define any aspect of change in a sound – volume, timbre, or pitch. The
circuits that create envelope control signals in synthesizers are called Envelope Generators (EGs).
The Slim Phatty has two identical EG circuits. When triggered, these circuits
produce time-varying control voltages having a start, a middle and an end.
The parameters that specify this progression are the Attack, Decay, Sustain
and Release controls, abbreviated as ADSR.
Attack determines the fade-in of the envelope. The Attack control adjusts
the time it takes for the envelope to go from zero to full value (in other
words, the fade-in time) when the EG is triggered. After the Attack segment
completes, the Decay control takes over, adjusting the second stage in the
evolution. Decay is the time that it takes for the signal to drop from the full
level to the level set by the Sustain control. Once the sustain level is reached,
it will remain there as long as the trigger signal is present. When the trigger
is finally released, the Release control determines how long it takes for the
envelope to return to zero (see the ADSR Envelope Signal).
The Slim Phatty has two envelope generators; one EG is dedicated to
the amplifier (to control the volume), and one EG is dedicated to the
filter (to control the cutoff frequency). The Filter EG can also be used
as a modulation source through the Modulation Matrix.
Page
16
Slim
Phatty
User’s
Manual
-­
The
Components
Envelope Generator Section Controls:
Attack:
When the ATTACK switch is selected, the analog edit control is used to adjust the Attack time of the corresponding envelope from 1 msec to 10 seconds.
Decay:
When the DECAY switch is selected, the analog edit control is used to adjust the Decay time of the corresponding envelope from 1 msec to 10 seconds.
Sustain:
When the SUSTAIN switch is selected, the analog edit control is used to set the Sustain level of the corresponding envelope.
Release:
When the RELEASE switch is selected, the analog edit control is used to adjust the Release time (the time
for the envelope to return to zero) from 1 msec to 10 seconds.
Additional Control:
The KB GATE jack on the side panel is a trigger input that accepts a footswitch (momentary, normally
closed like the Moog FS-1) or a gate signal. Pressing the footswitch or applying a gate signal (+5V) causes
both envelopes (Volume and Filter) to trigger.
PERFORMANCE
TIP:
Plugging
a
FS-­1
footswitch
into
the
KB
GATE
jack
allows
you
to
trigger
or
sustain
a
note
using
your
foot
without
playing
the
keyboard
–
useful
if
you
want
to
free-­up
both
hands
to
modify
two
panel
functions
at
once.
Page
17
Slim
Phatty
User’s
Manual
-­
The
Components
D. The Modulation Section
Modulation is the heart of making interesting sounds with analog subtractive synthesis. The SP’s Modulation section opens up a world of modulation possibilities
that were not available on the original Minimoog. The Modulation section allows
you to select from six modulation sources, specific one of four destinations, and
set the modulation amount. The output of the Modulation section is controlled by
the Modulation Wheel of your MIDI controller. You can also enable the MODULATION control knob to act as a Modulation Wheel control by pressing and holding the AMOUNT switch.
To try out a simple modulation effect, make the following settings:
- Set the LFO RATE to 6 Hz (about 11 o’clock on the analog edit control)
- Set the SOURCE to Triangle wave
- Set the DESTINATION to Pitch
- Set the AMOUNT to 50% (about 10 o’clock on the analog edit control)
These settings will produce a vibrato effect with variable depth when the
Modulation Wheel is engaged.
Section Controls:
LFO Rate:
When the LFO RATE switch is selected, the analog edit control is used to adjust the frequency of the LFO.
The frequency is adjustable from 0.2 Hz to 500 Hz. Since the LFO rate extends well into the audio range,
this allows the LFO to be used for clangorous (FM-like) modulations. Pressing and holding the LFO RATE
switch enables the Tap Tempo function. When Tap Tempo is enabled, the LFO RATE switch will blink on and
off. To escape this function, press and hold the LFO RATE switch until the light stops blinking. For more on
the Tap Tempo function, see Tap Tempo on page 25.
Amount:
When the AMOUNT switch is selected, the analog edit control is used to adjust the maximum amount of
modulation controlled by the Modulation Wheel. Pressing and holding the AMOUNT switch enables the
MODULATION control knob to act as a MOD WHEEL controller. When the MOD WHEEL function is
enabled, the AMOUNT switch will blink on and off. To escape this function, press and hold the AMOUNT
switch until the light stops blinking.
Source:
The SOURCE switch selects the source of the modulation. Each time the switch is pressed, it advances to
the next modulation source, as indicated by the corresponding LED. Four of the selections allow you to use
the LFO as a modulation source. When any of the LFO waves is selected, the associated LED will flash in
time with the LFO rate. The available Source selections are:
- LFO Sawtooth Wave
- LFO Square Wave
- LFO Triangle Wave
- LFO Ramp Wave
- Filt. Env. (Filter Envelope)/Sample & Hold
- Osc 2 (Oscillator 2)/Noise
Page
18
Slim
Phatty
User’s
Manual
-­
The
Components
The
Modulation
Section
(con’t)
Destination:
The DESTINATION switch selects the destination of the modulation. The modulation destination is chosen
in the same manner as the source. The modulation destination selections are:
- Filter (affects filter cutoff)
- Pitch (affects the pitch of both oscillators)
- Wave (affects the waveform of both oscillators)
- Osc 2 (affects the pitch of Oscillator 2)
E. The Output Section
The Slim Phatty features a monophonic audio output and a headphone output. Both of
these outputs appear on the back panel. The level of both outputs is adjusted simultaneously
by the Volume Control. An On/Off switch allows you to turn off the signal at the audio
output jack while keeping the Headphone signal active.
Section Controls:
Volume:
VOLUME is the main volume control. Rotating the control fully clockwise produces the maximum output.
Rotating the control fully counterclockwise silences the Slim Phatty. The VOLUME control setting is not
stored with the preset.
Output On/Off:
The OUTPUT ON/OFF switch controls the signal that appears at the audio output jack. This switch has no
effect on the Headphone output. This arrangement allows you to silence the audio output while you monitor and adjust the sound of the SP using headphones. The output is ON when the switch is lit.
Additional CV control:
The VOL CV jack on the back panel is a CV input for external control of the Output level. The jack accepts
a positive control voltage from 0 to 5 Volts, or an expression pedal like the Moog EP-2. A voltage of 0 volts
silences the SP, and a voltage of 5 volts corresponds to the output level set by the VOLUME control knob.
Page
19
Slim
Phatty
User’s
Manual
-­
The
Components
F. Input/Output Panel
The Back Panel provides all of the input and output connections. In addition to Audio Input/Output jacks,
there are CV and Gate inputs, connections for MIDI, and the power connector and power switch.
Power Connector:
This is a standard AC power inlet, Use only a power cord designed to mate with this receptacle. The Little
Phatty’s built-in universal power supply is designed to work with power inputs of 90-250 Volts AC, 50/60 Hz.
IMPORTANT
SAFETY
NOTE
–
Do
not
alter
the
power
connector
in
any
way.
Doing
so
can
result
in
the
risk
of
shock,
injury
or
death.
Be
familiar
with
the
safety
instructions
printed
at
the
beginning
of
this
manual.
If
the
connector
is
damaged,
refer
servicing
to
qualified
personnel
only.
Audio IN:
The Audio In jack allows an external audio source to be mixed with the SP’s VCOs, and then routed to the
filter for processing. The SP has no provisions for adjusting the level of this input, it must be controlled externally. The audio input is designed to distort as the level of the external audio gets very high, adding color
to the sound.
Audio OUT:
The Audio Out jack provides an unbalanced line-level signal for connecting to an amplifier or mixer.
CV Inputs:
The Pitch, Filter and Vol (Volume) CV jacks supply power and will accept an expression pedal such as the
Moogerfooger EP-2 (ring = +5.5 supply to the pedal, tip = variable CV return), or a control voltage from
–5 to +5 Volts. The KB Gate Input accepts a footswitch (a momentary, normally-closed footswitch like the
Moog FS-1) or a +5 Volt Gate Signal.
MIDI Connectors (DIN and USB):
These are DIN connections for MIDI In/Out/Thru, and MIDI USB connector. MIDI I/O is configurable for
either connection type. For more information on configuring MIDI, see page 32.
PERFORMANCE
TIPS:
1.
You
can
use
the
SP
to
process
any
audio
signal
simply
by
plugging
into
the
Audio
IN
jack.
To
hear
the
external
audio
signal
without
having
to
hold
down
a
key
on
the
keyboard,
plug
a
dummy
plug
(or
a
patch
cord
with
nothing
connected
to
the
other
end)
into
the
KB
Gate
jack.
This
will
leave
the
keyboard
gate
open,
and
the
volume
envelope
will
remain
at
its
Sustain
level
until
the
keyboard
gate
closes.
Due
to
the
design
of
the
envelope
circuits,
you
will
need
to
turn
the
envelope
Decay
parameter
down
below
12:00
in
order
for
the
Sustain
level
to
remain
constant.
If
you
notice
that
the
volume
of
the
external
signal
begins
to
slowly
fade
away,
check
to
be
sure
the
envelope
Decay
parameters
are
not
set
too
high.
2.
The
SP’s
Audio
Input
is
not
limited
to
processing
monophonic
signals
-­
it
can
work
well
for
processing
polyphonic
signals,
too.
For
example,
connect
the
MIDI
Out
of
the
SP
to
the
MIDI
Input
of
another
polyphonic
keyboard,
then
feed
that
audio
output
back
into
the
SP
through
the
Audio
In
jack.
Now
you
have
a
POLYPHONIC
source
that
is
being
affected
by
the
SP’s
Filter,
Overload
and
EGR
circuits.
Page
20
Slim
Phatty
User’s
Manual
-­
The
Components
G. Interface Panel
The Interface Panel is located on a far left of the instrument. The
Interface Panel provides a status display and controls for all of the
Slim Phatty’s software functions and instrument settings.
The status display is an LCD screen located in the center of the
panel above the section controls. When the SP is first powered on,
the screen will display the message:
Slim Phatty
Version X.x
The message will stay on the screen for a few seconds, and then
the screen will display the active preset. This preset will be the last
preset in use when the Slim Phatty was powered down.
Section Controls:
Master:
Pressing the MASTER switch places you in Master mode. In this mode, the VALUE knob is used to scroll
through the Master mode menus for the Slim Phatty. For a list of the Master mode menus, see page 26.
Preset:
Pressing the PRESET switch places you in Preset mode. In this mode, the VALUE knob is used to select the
preset. The PRESET switch also functions as ‘compare’ button, allowing you to toggle between stored and
edited presets. For more on Preset Mode, see page 23.
Value:
The VALUE knob is a continuous rotary encoder used to access menus and options, and select presets.
Depending on the selected parameter, the VALUE knob will adjust numeric values UP or DOWN, or toggle
amongst discrete options. The encoder has a built-in push button (called the VALUE pushswitch) that is
used to advance through the presets in Performance Sets and for stepping though Master menu submenus.
When naming a preset, the VALUE pushswitch will advance the cursor to the next letter.
Cursor:
The CURSOR switch is used to navigate around the display. In Master mode, the cursor is used to advance
through the parameters in the display, allowing you to make edits and changes. In Preset Mode, the cursor
is used to enter the Preset naming operation. Press CURSOR to get into cursor mode, and press MASTER
or PRESET to exit cursor mode.
Page
21
Slim
Phatty
User’s
Manual
-­
The
Components
Enter/Store:
The ENTER/STORE button is used to enter changes and store edited presets in PRESET mode and to
execute SysEx and System Utility functions in MASTER mode.
Fine Tune:
The FINE TUNE control is used to tune the Slim Phatty’s oscillators ±3 semitones for matching an external
reference pitch.
Glide On/Off:
The GLIDE ON/OFF switch enables or disables the glissando effect between notes. Glide is ON when the
switch LED is lit. The glide rate is set using the GLIDE RATE control in the oscillator section.
Octave Up/Down:
The OCTAVE UP and OCTAVE DOWN switches transpose incoming MIDI notes up or down by octaves.
The range is –2, -1, 0, +1, +2. Pressing either switch once will light the switch red and adjust the octave
accordingly. Pressing the same switch a second time will adjust the octave again and change the illumination
from red to amber, indicating that a two-octave change has been selected. The Octave settings in the Slim
Phatty are not stored per Preset, rather, they affect the operation of the SP globally.
Page
22
THE USER INTERFACE
Slim
Phatty
User’s
Manual
-­
The
User
Interface
Preset Mode
Preset mode is the default mode when the SP is powered on. Preset Mode is used to access presets and
provide control for editing, naming and storing sounds.
Preset sounds are selected using the VALUE knob. As the VALUE
knob is advanced, the next preset appears in the display and is immediately available to be auditioned (you do not need to ‘activate’
the preset to hear it). Pressing VALUE and turning the knob will
advance by increments of ten.
You can use the front panel controls to edit the sound at any point.
Changing any of the front panel controls will automatically switch
the lower part of the display from ‘PRESET ACTIVE’ to ‘PANEL
ACTIVE’, indicating that the preset has been modified. The PRESET
light also changes its illumination from red to amber, indicating that
the sound you hear is an edited version of the stored preset
You can toggle between the stored and edited sound by pressing
the PRESET button. This acts like a COMPARE function, allowing
you to compare the sound of the original and edited presets. When
using the COMPARE function, the PRESET button will alternate
colors and the LCD will display either ‘PRESET ACTIVE’ (the original
sound) or ‘PANEL ACTIVE’ (the edited sound).
NOTE:
When
switching
between
Master
and
Preset
modes,
the
last
used
preset
appears
in
the
display.
Storing Presets
To store a preset, press the ENTER button. This button doubles as the STORE button in Preset mode as
indicated on the front panel. Store is used to save an edited preset (Panel Active), or to change the location
of a stored preset (Preset Active).
When you press STORE, the LCD will display a message similar to the
one shown at left. The top line shows the location where the preset
will be saved, and the name of the preset that is currently stored in that
location. Use the VALUE knob to change to the desired preset location,
then press the CURSOR to move the cursor to the lower line of the
LCD. A default setting of ‘OVERWRITE: NO’ as shown protects you
from accidently overwriting a favorite preset. If you decide that you
do not want to save the preset, press ENTER and the SP will return to
Panel Mode without saving.
If you are sure you want to save the preset to the selected location,
use the VALUE knob to select ‘OVERWRITE: YES’ and press ENTER.
The SP will display the ‘PRESET STORED’ message confirming that
your preset was saved successfully.
Page
23
Slim
Phatty
User’s
Manual
-­
The
User
Interface
NOTE:
When
the
Arpeggiator
is
running,
the
ENTER/STORE
button
is
also
used
to
activate
the
latch
if
the
Latch
parameter
has
been
enabled.
For
more
on
the
Arpeggiator
and
Latch
functions,
see
page
40.
Changing A Preset Name
Changing a preset name is a simple operation. The characters in a name are individually selected by moving
the cursor to the desired location and scrolling through the character list. To change a preset name, press
the CURSOR button until it advances to the first letter of the name. Use the VALUE knob to select the
desired character or number. Press the VALUE pushswitch to advance the cursor to the next letter. Repeat
this action until all desired characters have been changed.
Preset names consist of any combination of 13 letters, numbers and punctuation characters. In order, the
available characters are:
(space) A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0 1 2 3 4 5
6789abcdefghijklmnopqrstuvwxyz!#$%&()*[email protected]
Press the CURSOR button once to select the first character in the
name as shown.
Use the VALUE knob to select a new character as shown. Use the
VALUE pushswitch to advance to the next character, then use the
VALUE knob to select the next character. Continue in this manner
until the desired name change is complete. When finished, press the
STORE button to enter the name change into memory. Select the
desired memory location, select ‘OVERWRITE: YES’, and press STORE
to save the new name.
PERFORMANCE
TIP:
When
a
preset
is
stored,
the
‘ON’
status
of
the
active
parameter
in
each
of
the
four
sections
is
also
stored.
For
example,
if
Cutoff
was
the
active
filter
parameter
when
the
preset
was
stored,
it
will
become
the
active
filter
parameter
again
when
the
preset
is
recalled.
By
saving
your
presets
with
this
in
mind,
you
can
have
the
four
analog
edit
controls
automatically
set
to
the
desired
parameters
when
the
preset
is
recalled.
This
is
a
great
feature
if
you
need
to
tweak
the
sound
in
live
performance!
Page
24
Slim
Phatty
User’s
Manual
-­
The
User
Interface
Tap Tempo
Tap Tempo is an easy and intuitive way to adjust the speed of the LFO Rate or the Arpeggiator Clock. The
Tap Tempo function is always available for any preset in PRESET Mode. Tap Tempo can be used to adjust
the LFO Rate when the Arpeggiator is not running, or adjust the Arpeggiator Clock when the Arpeggiator is
running.
To enter Tap Tempo Mode, press and hold the LFO RATE button until it starts flashing rapidly; this indicates
that Tap Tempo Mode is active.
When Tap Tempo is active and the Arpeggiator is not running, tapping the LFO RATE button will set the
internal LFO Rate and override the LFO Sync Mode (see ‘LFO SYNC’ on page 27). Both the LFO LED
and the LFO RATE button will begin flashing at the new rate, and the bottom line of the LCD will display a
status message indicating that the Tap Tempo function is active:
NOTE:
Once
activated,
Tap
Tempo
will
remain
activate
even
if
you
change
presets.
The
Tap
Tempo
rate
from
the
previous
preset
will
not
be
transferred
to
the
new
preset,
however.
When Tap Tempo is active and the Arpeggiator is running, tapping the LFO RATE button will set the rate
of the Arpeggiator Clock. Both the LFO LED and the LFO RATE button will begin flashing at the new rate,
and the LCD will display the new rate in BPM:
If the MODULATION control knob is adjusted while in Tap Tempo Mode, it will override the Tap Tempo and
adjust the LFO Rate or Arpeggiator Clock to the new value.
To exit Tap Tempo Mode, press and hold the LFO RATE button until it stops flashing. This will return to
the previous mode (either free running or MIDI clock).
NOTE:
If
the
Arpeggiator
is
set
to
‘MIDI
CLOCK’
when
Tap
Tempo
is
active,
Tap
Tempo
will
adjust
the
internal
LFO
Rate
and
not
the
Arpeggiator
Clock.
Page
25
Slim
Phatty
User’s
Manual
-­
The
User
Interface
Master Mode
Master Mode is used to access the global settings and Advanced Preset settings for the Slim Phatty, and the
routines for sending and receiving data.
To enter master mode, press the MASTER button. By default,
the first master menu entry is Performance Sets. When switching
between the Master and Preset modes, the last used master menu
entry appears.
When the master menu is active, the VALUE knob is used to scroll
through menu entries. To change a particular menu entry, you must
hit the CURSOR button to enable the parameter for editing. The
selected parameter will be underlined, indicating that this parameter
value can now be changed. The VALUE knob is now used to change
the parameter value(s). The chosen parameter is automatically
changed as the display is updated (i.e. if you scroll through values
and settle on something new, you don’t have to do anything to activate that new entry). If a menu contains more than one parameter
for editing, repeatedly pressing CURSOR will step through the available parameters. Press the MASTER button at any time to return to
Master Mode.
A. Master Mode Menus
Descriptions of each individual Master Mode menu appears below. A chart displaying the full Master Mode
Menu ‘tree’ appears in Appendix A.
PERFORMANCE SETS:
Performance Sets are collections of preset sounds, pre-arranged for
convenient access. There are four banks of Performance Sets containing 8 presets each (32 presets total). You select a bank (1-4) and then
set up a sequence of 8 presets in each bank. This allows you to easily
switch between these assigned presets in the order they are set up.
Once you have your performance bank set up, you can step sequentially through the bank by pressing the VALUE switch, or use the
CURSOR button to highlight the bank or preset, then use the VALUE
knob to make the change.
In the example menu shown here, the 3rd preset in Performance
Set 1 is Preset 24 - LEAD. For more on Performance Sets and how to
configure them, see page 50.
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ADVANCED PRESET:
Advanced Presets is a set of menus that allows you to access
additional parameters for the selected preset. These parameters are
stored individually for each preset. There are eleven Advanced Preset
menus:
- Filter Poles
- EGR Release
- Gate Trigger Options
- Filter Sensitivity
- Additional LFO Modulation Sources (SRC5 & SRC6)
- Pitch Bend
- Secondary Modulation destinations.
- Keyboard Priority
- Pot Mapping
- Arpeggiator
For more information, see the Advanced Preset Menus section on
page 36.
LFO SYNC:
The LFO Sync menu allows you to globally set the LFO to Internal (freerunning) or MIDI Clock. When set to ‘INTERNAL’, the MODULATION
control is used to set the rate of the LFO. When set to ‘MIDI CLOCK’,
the LFO rate is controlled by an external MIDI Clock and the selected
Clock Divider settings (see below). To change the LFO Sync Mode, use
the CURSOR button to move to the selection field and use the VALUE
knob to select the mode.
Modes: INTERNAL, MIDI CLOCK; the default is INTERNAL
NOTE:
For
additional
information,
see
Appendix
A
–
LFO
Sync
Modes
When the LFO Sync Mode is set to ‘MIDI CLOCK’, you can program
the clock divider to one of 15 different values. The divisor is based on
24 clocks per quarter note (the MIDI standard). The table on the following page shows how the number of MIDI clocks relates to musical
time values. When the LFO Sync Mode is ‘CLOCK’, the MODULATION control can be used to select the clock divider (the 15 divider
values correspond to the 15 LEDs in the MODULATION control lightpipe). The default clock divider value is 1/4 (= 24 clocks/quarter note).
PERFORMANCE
TIP:
You
can
adjust
the
clock
divider
value
in
real
time
-­
this
is
a
great
way
to
add
rhythmic
variations
to
a
performance.
For
example,
try
some
deep
filter
modulation
using
a
clocked
triangle
LFO
while
adjusting
the
divider
for
some
cool
rhythmic
fun!
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CLOCKS/QUARTER
NOTE
TIME VALUE
SP DISPLAY
3
1/32 note
1/32
4
Dotted 1/32 note
1/32 DOT
6
1/16 note
1/16
9
Dotted 1/16 note
1/16 DOT
12
1/8 note
1/8
18
Dotted 1/8 note
1/8 DOT
24
Quarter note
1/4
36
Dotted quarter note
1/4 DOT
48
Half note
1/2
72
Dotted half note
1/2 DOT
96
Whole note
WH
128
Whole note + quarter note
WH + 1/4
144
Whole note + half note
WH + 1/2
168
Whole note + dotted half note
WH + 1/2 DOT
192
Whole note + whole note
WH + WH
MIDI Clock Divider values
ANALOGUE MODE:
Analogue mode controls the way the analog edit controls work. In
SNAP mode, the parameter will ‘snap’ instantaneously to the current
potentiometer setting. In PASS-THRU mode, the parameter value
stays constant until the potentiometer passes through the current value. In TRACK mode, the parameter value moves in the same direction
as the knob is rotated (left or right) until the value and knob position
are identical. To change modes, use the CURSOR button to highlight
the parameter, then use the VALUE knob to set the new parameter
value.
Values: PASS-THRU, SNAP, TRACK; the default value is TRACK
KEYBOARD PRIORITY:
The Keyboard Priority menu allows you to select from 3 different types
of keyboard priority. Keyboard priority for a monophonic instrument
determines what happens when more than one key is pressed. A setting of LOW NOTE causes the lowest key pressed to sound, a setting
of HIGH NOTE causes the highest key pressed to sound, and a setting
of LAST NOTE causes the most recent key pressed to sound. To
change the keyboard priority, use the CURSOR button to highlight the
parameter, then use the VALUE knob to set the new parameter value.
Values: LOW NOTE, HIGH NOTE, LAST NOTE;
the default is LAST NOTE
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PROGRAM CHANGE SEND/RECEIVE:
This menu item is used to enable or disable the transmission (SND)
and reception (RCV) of MIDI program changes. To change the status
of either parameter use the CURSOR button to highlight the parameter, then use the VALUE knob to set the new parameter value.
Values: ON, OFF;
the default values are ON for both SND and RCV
FINE TUNE
The Fine Tune parameter is used to enable or disable the FINE TUNE
panel control (ON/OFF), or enable the AutoTune function (AUTO).
When the Tune parameter is set to ON, the FINE TUNE panel control
is used to tune the SP. In this mode, you can use the VALUE knob get
very precise tuning control by moving the display cursor over to the
numerical value and rotating the VALUE knob (the adjustment value is
from -1024 to +1023, representing roughly ± a third).
When the Tune parameter is set to OFF, the position of the FINE
TUNE panel control is stored and the control itself is disabled. This
feature prevents accidental bumping of the FINE TUNE panel control
during performance.
When the Tune parameter is set to AUTO, the AutoTune function is
engaged and the display changes as shown. AutoTune works to keep
the SP in tune by automatically making fine adjustments to the Fine
Tuning CV.
When AutoTune is enabled, the display shows the actual value of the
last note played (displayed as the MIDI note number, shown here as
‘60’), and the current tuning value (displayed in cents, shown here as
‘.00’). In this mode, the SP will continually tune to this value. To adjust
the note that you are tuning to, cursor over to the Note value in
the display and use the VALUE knob for precise adjustments. Hitting
another note on the keyboard will set that note as the new target for
tuning. You can exit out this menu by hitting the MASTER or PRESET
buttons, and the SP will remain in the AutoTune mode, maintaining the
current tuning.
Values: ON, OFF, AUTO; the default is ON
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NOTE:
While
you
are
in
this
menu
with
AutoTune
enabled,
the
output
of
the
SP
will
be
muted
(the
Output
ON/OFF
button
status
will
not
change,
however).
The
reason
for
muting
the
output
is
that
AutoTune
uses
a
special
Calibration
Preset
tone
which
isn’t
very
musical.
The
SP’s
output
will
remain
muted
as
long
as
you
stay
in
this
menu,
or
until
you
disable
AutoTune.
If
AutoTune
is
active
when
you
leave
the
menu,
it
will
remain
active
but
will
automatically
unmute
the
output
and
disengage
when
you
start
playing.
AutoTune
has
a
special
‘timeout’
feature
that
waits
15
seconds
after
you
stop
playing
before
engaging
the
AutoTune
function
in
the
background.
If
the
AutoTune
menu
is
displayed
during
this
time,
you
will
see
it
change:
AUTO
…
Until
the
timeout
is
finished,
at
which
point,
the
target
note
will
appear
again:
AUTO
60.12
The
SP
will
continue
to
autotune
while
you
are
playing
until
you
disable
it
in
the
menu,
or
until
you
switch
off
the
power.
For
more
on
the
Calibration
Preset
and
a
list
of
its
parameter
values,
see
Appendix
C.
TUNING SCALE:
Tuning Scale is a feature that allows you to specify one of 32 alternate
tuning scales for the SP. The default value of ‘0’ is ’Equal Temperament’,
meaning normal Western tuning. Additional scales can be added using
the Little Phatty Scale Editor software, available for the Mac and PC
platforms.
While the cursor is positioned under the selected scale, pressing the
ENTER switch presents a second page that allows you to set the root
note of the desired scale. This puts the start of the scale on whatever
note you prefer, allowing you to specify the custom tuning for any
mode or root note you wish to play in. Tuning scales are global settings
which are saved after power down.
TUNING SCALE
Values: 0 -31: the default value is ‘0’
ROOT NOTE
Values: 0 - 127
NOTE:
The
Little
Phatty
Scale
Editor
can
also
open
any
12-­note
tuning
file
created
by
Scala,
a
cross-­
platform
program
for
defining
and
analyzing
microtonal
tunings.
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PRECISION MODE:
Precision Mode is a feature that allows precision editing of SP parameters using the VALUE knob. Each SP parameter stored has a value
from zero to 4095. In Precision Mode that value is displayed on the
second line on the screen.
To edit a parameter in Precision Mode, press the corresponding
parameter button on the front panel (for example, Filter Cutoff). You
will see that parameter name along with its value on the display. To
edit with the VALUE knob, press the CURSOR button and rotate the
VALUE knob. Each click of the VALUE knob results in a change of one
value. Pressing the VALUE knob while simultaneously rotating it will
change the value in increments of 10, allowing for faster editing.
Changes made to a preset in Precision Mode are part of the current Panel Active edited sound. To make these changes permanent,
the preset must be stored (see “Preset Mode” on page 24). To exit
Precision Mode, press the MASTER or PANEL button. The last edited
parameter in Precision Mode will be remembered until it is changed in
Precision Mode or the unit is powered down.
Values: The default parameter is Volume Attack
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MIDI CHANNELS IN AND OUT:
This menu is used to select the SP’s MIDI In and Out channels. The SP
can only send and receive on one channel at a time, but each channel
can be set independently. To change the MIDI channel, use the
CURSOR button to highlight the desired parameter, then use the
VALUE knob to select the new parameter value.
Values: OFF, 1 – 16;
the default values are 1 for both MIDI In and MIDI Out
MIDI SETUP:
The MIDI SETUP menu is used to select the SP’s MIDI options. There
are seven pages of MIDI menus, beginning with the ‘ALL NOTES OFF’
menu. This menu allows you to issue an ‘All Notes Off ’ message to the
MIDI output, shutting off all active notes on the SP and/or any attached
MIDI tone modules or keyboards. This command is the equivalent of a
MIDI panic button to silence stuck notes. To issue the command, simply
press the ENTER button (you do not have to enable this menu with the
CURSOR button).
The second page of the MIDI Setup menu allows you to turn control of
the SP’s synth engine ON or OFF locally, i.e. any front panel controls that
modify the synth engine. It does not disable any MIDI transmitting or
receiving. A setting of ‘OFF’ will prevent doubling MIDI data in the event
you are using a MIDI sequencer with both the MIDI IN and MIDI OUT
connected, and the sequencer is echoing MIDI data back to the SP. To
change the Local Control setting, use the
CURSOR button to highlight the control value, then use the VALUE
knob to change the setting.
Values: ON, OFF; the default is ON
The third page of the MIDI Setup menu allows you to select the MIDI
input connection. Since the SP offers both MIDI DIN and USB connections, several input options are possible. To specify the MIDI input connection, use the CURSOR button to highlight the input selection, then
use the VALUE knob to select the desired input.
Values: NONE, DIN, USB, DIN/USB; the default is DIN/USB
TECH
NOTE:
‘DIN’
is
an
abbreviation
for
‘Deutsches
Institut
für
Normung’
(German
Institute
for
Standardization).
‘DIN
connectors’
commonly
refer
to
a
family
of
circular
connectors
that
were
standardized
by
the
DIN
for
commercial
electronic
use.
When
the
MIDI
standard
was
released
in
1983,
it
specified
a
5-­pin
DIN
connector
as
the
hardware
interconnection,
thus
the
‘MIDI
DIN’
connector.
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MIDI SETUP (con’t)
The fourth page of the MIDI Setup menu allows you to select the MIDI
output connection. To specify the MIDI output connection, use the
CURSOR button to highlight the output selection, then use the VALUE
knob to select the new output.
Values: NONE, DIN, USB, DIN/USB; the default is DIN/USB
The fifth page of the MIDI Setup menu allows you to select the routing of the MIDI Merge function for the USB input. When MIDI Merge
is ON, the SP will echo all MIDI data received at the USB MIDI Input
port to the selected MIDI Output port, merged with any MIDI data
generated by the SP. To change the selected MIDI output port, use the
CURSOR to highlight the output parameter, then use the VALUE knob
to select the desired output.
Values: NONE, DIN OUT, USB OUT, DIN/USB OUT;
the default is NONE.
The sixth page of the MIDI Setup menu allows you to select the routing of the MIDI Merge function for the DIN input. When MIDI Merge
is ON, the SP will echo all MIDI data received at the MIDI DIN Input
port to the selected MIDI Output port, merged with any MIDI data
generated by the SP. To change the selected MIDI output port, use the
CURSOR to highlight the output parameter, then use the VALUE knob
to select the desired output.
Values: NONE, DIN OUT, USB OUT, DIN/USB OUT;
the default is NONE.
NOTE:
When
using
MIDI
Merge,
take
precautions
to
insure
that
you
do
not
create
a
MIDI
feedback
loop
(the
output
is
passed
back
into
the
input
and
then
merged
with
the
output
again),
or
you
may
experience
unwanted
side
effects
like
a
locked-­up
SP.
Should
this
happen,
cycling
the
power
should
resolve
the
condition,
but
it
is
best
not
to
create
a
MIDI
feedback
loop
in
the
first
place.
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MIDI SETUP (con’t)
The seventh page of the MIDI Setup menu allows you to set up multiple
Moog synths as a polyphonic synth stack. The settings are ‘POLY: OFF’ or
‘POLY: (#) of (##)’. The first number represents which note this particular SP is assigned to play, the second number sets the total number
of available voices. For example, if you had an SP and a Little Phatty, you
would set the Little Phatty to ‘POLY: 1 of 2’ and you would set the SP
to ‘POLY: 2 of 2’. Connect the MIDI OUT from the Little Phatty to the
MIDI IN on the SP. You should now be able to play duophonically, with
the Little Phatty sounding the first note played on the keyboard and the
Slim Phatty sounding the second note. If all available voices are in use,
additional notes will not sound until enough keys are released to free a
voice. MIDI Continuous Control numbers (MIDI CC’s) are consistent
between the Little Phatty and Slim Phatty, so any parameter changes
such as pitch bend and mod wheel, filter cutoff and so on, should affect
all voices simultaneously.
NOTE:
When
the
Arpeggiator
is
activated,
it
overrides
any
POLY
mode
settings.
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SYSEX MENU:
SysEx (System Exclusive) is a set of commands to transmit and receive
selected presets, bulk dumps and firmware dumps. For more information on SysEx commands, see the SysEx Menus section on page 42.
SYSTEM UTILITIES:
System Utilities is a set of commands used to perform a system reboot,
restore factory default values or perform various system calibrations on
the instrument. For more information, see the System Utilities Menus
section on page 45.
NOTE ENTRY:
Note Entry allows you to specify a note to be played when you press
the ENTER button, allowing you to conveniently audition a Preset if
you don’t have a MIDI controller connected to the Slim Phatty. In this
menu, note values are specified as MIDI notes.. The range of valid MIDI
note values is 4 to 99, and the default value is 52, which specifies the ‘E’
below middle C. To the right of the MIDI note value is the play mode.
Three play modes are available: Momentary (Momntary), Latching, or
DemoMode.
When Momentary mode is selected, the note will be played for as long
as you hold down the ENTER button, and will stop when you let go.
When Latching mode is selected, pressing ENTER starts a note, which
will continue to play until you press ENTER again. In this mode, you
can go to other menu pages and the note will continue until you go
back to the Note Entry menu and press ENTER again.
When DemoMode is selected, it will automatically play the selected
note every time you switch Presets. The note will play for about 30
seconds and shut off automatically. You can adjust all of the SP controls
while the note is playing.
You can also turn on the arpeggiator and then go to the Note Entry
menu and play a note.
Values: Note values: 4 – 16; the default value is 52
Modes : Momnatry, Latching, DemoMode;
the default value is Momntary
PERFORMANCE
TIP:
You
can
quickly
change
a
Master
Menu
parameter
during
performance
by
first
entering
Master
Mode
and
select
the
desired
parameter
menu
using
the
VALUE
knob,
then
return
to
Preset
Mode.
When
you
are
ready
to
make
the
change,
press
MASTER.
The
desired
menu
item
will
be
displayed,
allowing
you
to
quickly
make
adjustments.
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B. Advanced Preset menus
The Advanced Preset menu provides a set of additional programming parameters for each preset. These
parameters are stored individually for each preset.
FILTER POLES:
This menu allows you choose the number of Filter Poles for the
preset. The number of Filter Poles specifies the filter response, from a
gentle 6db/octave (1 pole) to a steep 24db/octave (4 poles). To select
the number of Filter Poles, use the CURSOR button to highlight the
parameter, then use the VALUE knob to set the new parameter value.
Values: 1, 2, 3, 4
EGR RELEASE:
This menu allows you to turn the EGR Release parameter ON and
OFF. EGR Release is used to enable or disable the Release segment
of both the filter and volume envelopes. To change the status, use the
CURSOR button to highlight the parameter, then use the VALUE knob
to set the new parameter value.
Values: ON, OFF
GATE:
The Gate menu allows you to select how the envelopes are triggered
when more than one key is pressed on the keyboard. A setting of
LEG ON (Legato ON) means that the envelopes aren’t retriggered
until the key is fully released. A setting of LEG OFF (Legato OFF) will
retrigger the envelope on a new note from the current EGR level. A
setting of EGR RESET will force the envelope generators to start from
0 volts each time a note is triggered. To change the Gate mode, use
the CURSOR button to highlight the parameter, then use the VALUE
knob to set the new parameter value.
Values: LEG ON, LEG OFF, EGR RESET
FILTER SENSITIVITY (FILT. SENS):
The Filter Sensitivity menu allows you to select how the keyboard
velocity will affect the filter cutoff frequency. Positive values increase
the velocity sensitivity. This will raise the filter cutoff as the keys
are struck harder, mimicking the properties of acoustic instruments.
Negative values will have the opposite effect, lowering the filter cutoff
frequency as the keys are struck harder. To change the parameter, use
the CURSOR button to highlight the parameter, then use the VALUE
knob to set the new parameter value.
Values: -8... 0... +8
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MOD SOURCE 5 (MOD SRC 5):
This menu allows you to select one of two modulation options that
will be used when the FILT ENV source is selected on the front panel
(Modulation Source 5). FILT (Filter Envelope) is the default source, but
S-H (Sample & Hold) can be chosen as an alternate. To change the
parameter, use the CURSOR button to highlight the parameter, then
use the VALUE knob to set the new parameter value.
Values: FILT, S-H
MOD SOURCE 6 (MOD SRC 6):
This menu allows you to select one of two modulation options that
will be used when the OSC2 source is selected on the front panel
(Modulation Source 6). OSC2 (Oscillator 2) is the default source, but
Noise can be chosen as an alternate. To change the parameter, use the
CURSOR button to highlight the parameter, then use the VALUE knob
to set the new parameter value.
Values: OSC2, NOISE
MODULATION DESTINATION 2 (MOD DEST2):
This menu allows you to program a secondary destination for
modulation. The four destination options here are the same as
those offered on the front panel (the primary modulation). The
Modulation AMOUNT control specifies both the primary and
secondary modulation amounts - there is no separate amount control
for the secondary modulation. To program a secondary modulation
destination, use the CURSOR button to highlight the destination
parameter, then use the VALUE knob to set the new parameter value.
Values: OFF, PITCH, FILTER, WAVE, OSC2
PITCH BEND (PB):
The Pitch Bend menu allows you to individually set the positive and
negative ranges for MIDI Pitch Bend messages. The settings are
specified in semitones. To change either parameter, use the CURSOR
button to highlight the parameter, then use the VALUE knob to select
the new parameter value.
Values: UP: 0, +2, +3, +4, +5, +7, +12
DN: 0, -2, -3, -4, -5, -7, -12
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KEYBOARD PRIORITY (KB PRIOR):
The Keyboard Priority menu allows you to select the keyboard priority for individual presets. The default is GLOB (Global), which inherits
the global keyboard priority setting from the Master KEYBD PRIORITY menu, but this can be changed to low note, high note or last note
priority. To make a change, use the CURSOR to move to the priority
parameter field, then use the VALUE knob to select the desired value.
Values: GLOB, LOW, HIGH, LAST; the default value is GLOB
TUNING SCALE
The Tuning Scale menu allows you to select the tuning scale for individual presets. The default is GL (Global), which inherits the global keyboard priority setting from the Master TUNING SCALE menu, but this
can be changed to any one of the 32 assigned tuning scales To make a
change, use the CURSOR to move to the priority parameter field, then
use the VALUE knob to select the desired value.
Values: GLOB, 0 - 31
POT MAP:
The Pot Mapping menu allows you to make arbitrary MIDI Continuous
Controller (CC) assignments to each of the four Analog Edit knobs
on the front panel (MOD, OSC, FILT, and EGR). Additionally, the four
knobs can be individually programmed to provide internal, external,
or combined MIDI control. Among its many possibilities, Pot Mapping
allows you to ‘reprogram’ the four panel knobs to control any of the
SP functions. For example, you could program Pot Mapping to give you
control of Filter Cutoff, Resonance, Overload and EG Amount, all at the
same time.
To set up Pot Mapping, press the CURSOR button and use the VALUE
knob to select the desired control knob (MOD, OSC, FILT, or EGR).
Press the CURSOR button again to move to the next field and select
the desired MIDI CC parameter.
NOTE:
When
Pot
Mapping
is
enabled
for
a
given
panel
section,
the
mapping
assignment
overrides
the
normal
CC
assignments
in
that
section.
For
example,
in
the
Modulation
section,
the
LFO
Rate
is
transmitted
as
CC#03,
and
the
Amount
transmitted
as
CC
#06.
If
you
set
up
Pot
Mapping
in
the
Modulation
section
to
send
MIDI
CC#21,
the
Modulation
knob
will
exclusively
transmit
CC#21
when
Pot
Mapping
is
enabled,
and
not
CC#03
or
#06.
When
Pot
Mapping
is
disabled,
the
Modulation
knob
will
revert
to
sending
the
normal
MIDI
CC’s
#03
and
#06.
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POT MAPPING (con’t):
Press the CURSOR button once more to select whether the assignment applies to internal only (INT), external only (EXT) or BOTH.
Pressing the CURSOR button again will return you back to the
beginning.
Once programmed, Pot Mapping is enabled in a section by selecting
the active parameter in that section. For example, suppose Pot
Mapping is configured for the MODULATION knob to send MIDI
CC#10. To activate Pot Mapping in the Modulation section, press the
button that is currently active (i.e. lit) in that section. The button will
turn off (no button in the Modulation group will be illuminated); the
MODULATION knob will now send MIDI CC#10 information when
it is adjusted. To disable Pot Mapping in the Modulation section, simply
press one of the buttons in that section, and the MODULATION
knob will return to its normal function.
Values: MIDI CC assignments: OFF, 0-127
Destination: INT, EXT, BOTH
PERFORMANCE
TIP:
Here’s
a
Pot
Mapping
example:
suppose
you
have
an
external
audio
device
that
you
want
to
control
independently
of
the
SP.
You
could
program
Pot
Mapping
to
have
the
Modulation
control
transmit
MIDI
CC
#XX,
but
only
have
it
programmed
for
external
control
(EXT).
With
this
setup,
you
press
the
active
control
in
the
Mod
section
(either
the
LFO
Rate
or
Amount
switch)
to
engage
Pot
Mapping
without
affecting
your
SP’s
sound
or
state.
Now
when
you
adjust
the
MOD
control,
it
sends
MIDI
CC
#XX
out
to
your
external
MIDI
device,
but
has
no
effect
on
the
SP’s
sound
engine.
Page
39
Slim
Phatty
User’s
Manual
-­
The
User
Interface
ARPEGGIATOR:
The Arpeggiator provides a wide range of musical sequencing possibilities. The Arpeggiator is programmed for each preset individually
through the seven menu pages described here. The Arpeggiator is
activated from the front panel (see Activating the Arpeggiator and Latch,
page 52). To enter the Arpeggiator Menu, use the CURSOR to highlight
‘ARPEGGIATOR’ and press ENTER.
When you enter the Arpeggiator menu, the top line of the display
changes to indicate that you are now programming the Arpeggiator.
The first page of the Arpeggiator Menu allows you to enable the
arpeggiator function for the chosen preset. When ‘ON’ is selected,
the arpeggiator is ‘armed’ and ready to be switched on from the front
panel. When ‘OFF’ is chosen, the arpeggiator will remain off, preventing you from switching it on accidently. To change the Enable status, use
the CURSOR to move to the ON/OFF parameter field, then use the
VALUE knob to select the desired setting.
The second page of the Arpeggiator menu allows you to select the
Arpeggiator Clock Source. There are three possible clock sources:
INT - The Arpeggiator Clock
LFO - The SP’s Low Frequency Oscillator
MIDI - An externally applied MIDI Clock
When ‘INT’ is selected as the clock source, the Arpeggiator runs from its
own internal clock. In this mode, when the Arpeggiator is switched ON
the Arpeggiator Clock rate is adjusted either with the MODULATION
knob, or by using the Tap Tempo function, or by issuing a MIDI CC#90
command. Note that you must select the LFO RATE switch when the
Arpeggiator is ON in order to use the MODULATION knob to change
the Arpeggiator Clock rate (the MODULATION control does not adjust the speed of the LFO when the Arpeggiator is running).
When ‘LFO’ is selected as the clock source, the Arpeggiator is driven
from the Low Frequency Oscillator. In this mode, the MODULATION
knob adjusts the speed of the Arpeggiator Clock and the LFO Rate
together, making it possible to get synchronous, arpeggiated LFO effects.
When ‘MIDI’ is selected as the clock source, the Arpeggiator is driven
from an externally applied MIDI Clock. In this mode, the MIDI Clock
synchronizes the Arpeggiator to the sending device (a software
DAW, for example). Note that if no MIDI Clock signal is present, the
Arpeggiator will not run and no notes will be heard.
NOTE:
For
additional
details,
see
Appendix
B
–
Arpeggiator
Clock
Source.
Page
40
Slim
Phatty
User’s
Manual
-­
The
User
Interface
ARPEGGIATOR (Con’t):
The third page of the Arpeggiator menu allows you to specify the
Arpeggiator Clock Divider. The available Arpeggiator Clock Divider
values are the same as the LFO Clock Divider (see table on page 28).
To make a selection, use the CURSOR button to move to the divider
parameter field, then use the VALUE knob to select the desired divisor
value. The default clock divisor value is ‘1/4’.
The fourth page of the Arpeggiator menu allows you to select the range
of the arpeggiator, specified in octaves. Up to ± 3 octaves can be selected. To make a selection, use the CURSOR button to move to the octave
parameter field, then use the VALUE knob to select the desired octave
value.
Values: -3, -2, -1, 0, 1, 2, 3; the default value is 1.
The fifth page of the Arpeggiator menu allows you to select the order
(pattern) in which notes are sequenced. The choices are:
UP - Notes are arpeggiated from lowest to highest
DN - Notes are arpeggiated from highest to lowest
ORDER - Notes are arpeggiated in the order played
To make a selection, use the CURSOR button to move to the pattern
parameter field, then use the VALUE knob to select the desired pattern.
The default value is ‘UP’.
The sixth page of the Arpeggiator menu allows you to select the
Arpeggiator mode. The choices are:
LOOP - When the arpeggiator reaches the end, it loops
back to the starting point.
BACK-FORTH - When the Arpeggiator reaches the end it
reverses direction and returns to the starting point.
ONCE - The arpeggiator makes a single pass and then stops.
To make a selection, use the CURSOR button to move to the mode
parameter field, then use the VALUE knob to select the desired mode
value. The default value is ‘LOOP’.
Page
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Slim
Phatty
User’s
Manual
-­
The
User
Interface
ARPEGGIATOR (Con’t):
The seventh page of the Arpeggiator menu allows you to enable or disable the Latch function. The Latch allows the Arpeggiator to keep repeating the arpeggio state when you remove your hands from the keyboard.
The Latch menu arms the Latch function the same way the Arpeggiator
ON/OFF menu arms the Arpeggiator. When the Latch parameter is
set to ‘ON’, the Latch can be activated from the front panel (to activate
the latch, you must be in PRESET Mode when the Arpeggiator is running - see Activating the Arpeggiator and Latch for more). When ‘OFF’ is
selected, the Latch is always off and cannot be activated accidently. To
enable/disable the latch function, use the CURSOR button to move to
the latch parameter field, then use the VALUE knob to change the latch
status. The default value is ‘OFF’.
C. SYSEX (System Exclusive) Menus
SysEx menus are a set of commands to transmit and receive selected presets, bulk dumps and firmware
dumps. To enable SysEx menus, press the CURSOR button. This will highlight the menu options shown
on the second line of the display. Once highlighted, use the VALUE knob to scroll through the menus. To
activate a command, press the ENTER button.
SEND CURRENT PRESET:
This option allows you to send the current preset (system exclusive
data format) for archiving a preset in the SP’s memory. This requires
another SP, Little Phatty, or computer with a MIDI interface and a program that can accept a SysEx dump. You must enable the device that
is to receive the SysEx data. Once the remote device is enabled, press
ENTER to start the data transfer.
When ENTER is pressed, the LCD will briefly display the ‘SENDING
CUR PRESET’ message shown. When the operation is complete, the
display will return to the SYSEX menu.
Page
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Slim
Phatty
User’s
Manual
-­
The
User
Interface
C. SYSEX Menus (Con’t)
SEND ALL PRESETS:
This option allows you to send the system exclusive data for archiving
the complete bank of presets in the SP’s memory. To complete this
command, enable the device that is to receive the SysEx data. Once
the remote SysEx device is enabled, press ENTER to start the data
transfer.
When ENTER is pressed, the LCD will briefly display the ‘SENDING
ALL PRESETS’ message shown and the ENTER button will stay lit until
the data transfer is complete. When the operation has finished, the
display will return to the SYSEX menu.
BULK DUMP:
This option allows you to save the entire state of the SP (including all
global data, performance set data and preset data) for later recovery.
To execute a bulk dump, enable the device that is to receive the SysEx
data. Once your remote SysEx device is enabled, press ENTER to start
the data transfer.
When ENTER is pressed, the LCD will briefly display the ‘SENDING
BULK DATA’ message shown and the ENTER button will stay lit until
the data transfer is complete. When the operation has finished, the display will return to the SYSEX menu.
Page
43
Slim
Phatty
User’s
Manual
-­
The
User
Interface
Receiving SysEx Data
The SP is able to receive System Exclusive data at any time without any special prior setup. SysEx files are
recognized and received automatically when a SysEx data transfer is initiated. The Little Phatty’s LCD screen
will display the status of SysEx data transfers as follows:
SINGLE PRESETS:
The SP will briefly display a ‘RECEIVING SINGLE PRESET’ message
whenever a single preset is transmitted via SysEx. The preset will
automatically be stored at the current preset location. For example, if
the current preset location is 31 when the SysEx is received, the new
preset data will be written into location 31.
ALL PRESETS:
The SP will display a ‘RECEIVING ALL PRESETS’ message when a bank
of presets is transmitted. The transmitted bank will replace the current
bank.
BULK DUMP:
The SP will display a ‘RECEIVING BULK DUMP’ message when a bulk
dump is transmitted.
FIRMWARE UPDATES:
The SP will display a ‘RX FIRMWARE’ message when a firmware
update is transmitted. Additional status messages may appear on the
second line of the display as the transmission executes. After the firmware update is completed, the SP will automatically reset.
Page
44
Slim
Phatty
User’s
Manual
-­
The
User
Interface
D. System Utilities Menus
System Utilities provide a set of useful system commands, including
commands to calibrate, restore factory defaults and set global system
options. There are six pages of System Utilities menus, beginning with
the Version number display.
The second page of the System Utilities menu displays the Headphone
Volume (HP VOL) menu , which allows you to scale the headphone
volume in relation to the output volume. This can be adjusted from
0 (off) to 255 (max). To change the scale value, use the CURSOR to
move to the scale parameter field then use the VALUE knob to select
the desired value.
The third page of the System Utilities menu allows you to enable or
disable menu wrapping. When menu wrapping is enabled (‘ON’),
menus will wrap back to the beginning when you reach the end. When
disabled (‘OFF’), menus will not wrap. To enable/disable menu wrapping, use the CURSOR to move to the ON/OFF parameter field, then
use the VALUE knob to select the desired value. The default is ‘ON’.
The fourth page of the System Utilities menu allows you to perform a
Master Reboot of the SP, which is similar to turning the power OFF and
ON. To perform this action, press ENTER.
You will be asked to confirm this operation (Yes/No). If you
are unsure, select NO and press ENTER to return to the System Utilities menu without any action. If you are sure, use the
VALUE knob to select YES and press ENTER. This will reboot
the SP.
The fifth page of the Systems Utilities menu allows you to restore the
global default values, performance sets and all factory presets. When
you are ready to execute this operation, press ENTER to activate.
Note:
You
should
back
up
any
presets
you
wish
to
save
prior
to
performing
this
action.
You will be asked to confirm this operation (Yes/No). If you
are unsure, select NO and press ENTER to return to the System Utilities menu without any action. If you are sure, use the
VALUE knob to change from NO to YES and press ENTER.
This will restore the factory default global values, performance
presets and factory presets.
Page
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Slim
Phatty
User’s
Manual
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The
User
Interface
While the restore process is taking place, the LCD will briefly
display a ‘RESTORING FACTORY DEFAULTS’ message. When
complete, the screen will return to the System Utilities menu.
The sixth page of the System Utilities menu allows you to calibrate the
Slim Phatty. In the past, calibration of analog synthesizers had to be
performed manually by experienced service personnel. The SP’s builtin calibration utilities now allow you to perform many of these procedures yourself, without the expense and hassle of shipping the SP back
to the factory for calibration. The SP’s calibration utilities allow you to
perform individual calibrations on the oscillators and the note range.
For example, the Note Calibration operation individually tunes each
note exactly for each oscillator and octave setting. This tuning information is stored in the SP’s EEPROM and referenced when playing a note
to guarantee that the SP’s oscillators will be in tune. Other calibrations
ensure that variable controls such as the pitch wheel amount and oscillator 2 detuning function predictably and precisely.
To access the calibration options, press ENTER, then use the VALUE
knob to select the desired calibration.
Notes:
All
calibration
procedures
should
be
thoroughly
reviewed
before
proceeding.
Observe
the
following
precautions
and
recommendations
before
attempting
any
calibration
operation.
1.
The
SP
must
be
at
a
stable
and
constant
temperature
during
calibration.
You
should
allow
the
SP
to
warm
up
45
minutes
before
beginning
any
calibrations.
2.
The
Note
Calibration
procedure
takes
about
two
hours
to
cover
the
full
MIDI
note
range.
If
you
are
performing
this
calibration,
allow
sufficient
time
for
the
calibration
process
to
complete.
3.
The
SP
is
calibrated
at
the
factory.
The
Note
Calibration
operation
is
not
necessary
unless
the
SP
goes
out
of
tune.
The
Note
Calibration
overwrites
the
current
calibration
lookup
table
(LUT).
Performing
a
Factory
Restore
operation
will
not
cause
the
LUT
to
revert
to
the
factory
calibration.
4.
You
can
exit
out
of
a
calibration
at
any
time
by
pressing
the
MASTER
button.
For
the
Note
Calibration
operation,
only
those
notes
that
have
already
been
calibrated
will
be
saved.
The
remaining
notes
will
revert
to
their
previous
calibration
values.
Interrupting
the
Note
Calibration
operation
in
this
manner
may
result
in
inaccurate
tuning.
5.
Note
Calibration
is
not
meant
for
overall
tuning
drifts,
such
as
if
the
SP
is
10
cents
sharp.
Small
tuning
drifts
are
best
taken
care
of
using
the
AutoTune
function.
6.
If
you
perform
a
Note
Calibration,
it
is
highly
recommended
that
you
also
perform
the
Oscillator
2
Frequency
Calibration
to
ensure
accurate
frequency
tracking
with
the
new
LUT.
Page
46
Slim
Phatty
User’s
Manual
-­
The
User
Interface
CALIBRATION (con’t)
NOTE CALIBRATION:
This calibration option allows you to select Note calibration. This
calibrates individual notes exactly for each oscillator and octave setting.
Press ENTER to access the Note calibration menu.
The Note calibration menu will be displayed, allowing you to set the
calibration range. The default note range is MIDI notes 12 - 116. For
every one of these notes, the pitches are calibrated at each of the
octave settings, from 16’ to 2’. To change the range, use the CURSOR
button to move to the start or end field, and use the VALUE knob to
select the MIDI note value. Then press ENTER.
Note:
A
full
Note
calibration
using
the
default
range
(12
-­
116)
can
take
about
two
hours
to
complete.
By
specifying
a
narrower
range
of
notes,
however,
you
can
shorten
the
calibration
time.
You will be asked if you wish to proceed. Use the VALUE knob to select YES or NO. If you are uncertain or if you change your mind about
performing this calibration, select NO and press ENTER. You will be
returned to the System Utilities Calibration menu. Otherwise, select
YES and press ENTER.
Calibration will begin, and the display will appear as shown. The values
displayed are the MIDI note number being calibrated, the calibration
value (this is the value stored in the SP’s EEPROM), and the actual
measured note in MIDI Note Number Cents (in the example shown
here, ‘32.01’ indicates MIDI note 32 and the actual measured note is
01 cents sharp). Note calibration will proceed through the specified
range of notes, tuning each note individually, first for oscillator 1 and
then oscillator 2.
Note:
You
can
exit
out
of
Note
calibration
at
any
time
by
pressing
the
MASTER
button.
Only
those
notes
that
have
been
calibrated
up
to
that
point
will
be
saved.
The
remaining
notes
will
revert
to
their
previous
calibration
values.
Interrupting
the
Note
Calibration
operation
in
this
manner
may
result
in
inaccurate
tuning.
When Note calibration is complete, the message ‘SUCCESSFUL’ will
appear on the display and the new calibration values will be stored in
the SP’s EEPROM. To exit the calibration, press ENTER to return to
the System Utilities Calibration menu or press MASTER to exit the
calibration and return to the highest level of the System Utilities menu.
Page
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Slim
Phatty
User’s
Manual
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The
User
Interface
CALIBRATION (con’t)
PITCH WHEEL AMOUNT:
This option allows you to select Pitch Wheel Amount calibration. This
calibrates the Pitch Wheel Amount parameter to precise semitone
values (± 2, 3, 4, 5, 7 and 12). Press ENTER to access the Pitch Wheel
Amount calibration menu.
You will be asked if you wish to proceed. Use the VALUE knob to
select YES or NO, then press ENTER. If you are uncertain, or if you
change your mind about performing this calibration, select NO and
press ENTER. You will be returned to the System Utilities Calibration
menu. Otherwise, select YES and press ENTER.
Calibration will begin, and the display will appear as shown. The first
number displayed is the amount of pitch bend being calibrated (in this
example, +2 means ‘plus two semitones’). The second number is the
calibration value (this is the value stored in the SP’s EEPROM), and the
third number is the actual measured note, which is displayed in MIDI
Note Number Cents (in this example, ‘62.36’ indicates MIDI note 62,
and the actual measured note is 36 cents sharp). All Pitch Amount
calibrations are based on MIDI note 60, so for a calibration value of +2,
the target note value is 62.00. As the calibration operation proceeds,
the calibration values will increment first through all of the positive
Pitch Wheel amounts (+2, +3, +4. +5, +7, +12) and then all of the
negative Pitch Wheel amounts (-2, -3, -4, -5, -7, -12).
When the calibration is complete, the message ‘SUCCESSFUL’ will appear on the display and the new calibration values will be stored in the
SP’s EEPROM. To exit the calibration, press ENTER to return to the
System Utilities Calibration menu or press MASTER to exit the calibration and return to the highest level of the System Utilities menu.
Page
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Slim
Phatty
User’s
Manual
-­
The
User
Interface
CALIBRATION (con’t)
OSCILLATOR 2 FREQUENCY (OSC2 FREQ):
This option allows you to select OSC2 Frequency Calibration. This
calibrates the OSC2 FREQ control so that turning the editing dial all
the way CCW turns OSC2 down exactly a fifth (-7 semitones) and
turning all the way CW turns OSC2 up exactly a fifth (+7 semitones).
Press ENTER to access the OSC2 Frequency Calibration menu.
You will be asked if you wish to proceed. Use the VALUE knob to select YES or NO. If you are uncertain, or if you change your mind about
performing this calibration, select NO and press ENTER. You will be
returned to the System Utilities Calibration menu. Otherwise, select
YES and press ENTER.
Calibration will begin, and the display will appear as shown. The first
number that appears on the display is the base note for calibration
(MIDI note 60). The second number is the calibration value (this is
the value stored in the SP’s EEPROM), and the third number is the
actual measured note, which is displayed in MIDI Note Number Cents
(in the example shown here, ‘64.37’ indicates MIDI note 64, and the
actual measured value is 37 cents sharp). When calibration starts, the
SP first tunes itself to the base note. As this happens, you will see the
measured note value hone in on 60.00. Then the calibration value will
change as the note climbs to 67.00, at which point it has calibrated the
maximum value (+7 semitones), and then the note descends to 53.00
at which point it has calibrated the minimum value (-7 semitones).
When the calibration is complete, the message ‘SUCCESSFUL’ will appear on the display and the new calibration values will be stored in the
SP’s EEPROM. To exit the calibration, press ENTER to return to the
System Utilities Calibration menu or press MASTER to exit the calibration and return to the highest level of the System Utilities menu.
Page
49
Slim
Phatty
User’s
Manual
-­
The
User
Interface
Performance Sets
Performance Sets is a feature that allows you to customize the order of SP presets for a live performance
situation or to enhance your productivity in a studio environment.
Performance Sets are based on the idea that during a performance, you may need to switch between a sequence of sounds that doesn’t necessarily match up to the preset locations. Performance Sets gives you the
ability to set up sequences of sounds that you can step through easily and quickly during a performance.
The SP has four Performance Sets located in the Master menu. Each Performance Set contains eight preset
entries, so set 1 has an array of 8 presets; set 2 has an array of 8 presets, etc. Viewed as a table, the
Performance Sets might look like this:
SET
PRESET 1
PRESET 2
PRESET 3
PRESET 4
PRESET 5
PRESET 6
PRESET 7
PRESET 8
1
24
58
02
89
34
38
23
01
2
02
03
51
05
06
92
07
08
3
48
38
56
57
12
13
98
76
4
34
35
36
37
44
45
46
47
The first entry in Set 1 above is Preset 24; the second entry is Preset 58, and so on. Performance Sets allow
you to sequence up to 32 presets for your specific needs. Once the Performance Sets are configured, you
can call up a set and step though the sequence using the VALUE switch.
The example on the right shows the preset stored in the first location of Performance Set 3 (Preset 48 – SLIM CHANCE). To step
through this sequence, press the VALUE switch. Each press will
advance to the next preset in the sequence. After the eighth preset
is reached, the next press of the VALUE switch will cycle back to the
first preset in Performance Set 3.
To return to Preset mode, press the PRESET button. The preset displayed will be the last preset selected in the Performance Set.
Pressing the MASTER button again will return to the last used master
menu entry.
Note:
The
factory
default
setup
for
Performance
Sets
is
shown
below.
When
you
perform
a
Factory
Restore
operation,
all
Performance
Sets
will
default
to
these
values:
Page
50
SET
PRESET 1
PRESET 2
PRESET 3
PRESET 4
PRESET 5
PRESET 6
PRESET 7
PRESET 8
1
00
01
02
03
04
05
06
07
2
08
09
10
11
12
13
14
15
3
16
17
18
19
20
21
22
23
4
24
25
26
27
28
29
30
31
Slim
Phatty
User’s
Manual
-­
The
User
Interface
Editing Performance Sets
To edit a Performance Set, use the CURSOR key to select the Performance SET number (1-4), ENTRY
location (1-8) and PRESET (00-99). For example, to select the SET number, press the CURSOR button
once to highlight the SET number for editing. Press the CURSOR button a second time to advance to the
ENTRY location, and a third time to advance to the PRESET.
In the example show here, the SET number is ready to be changed.
The number is changed by rotating the VALUE knob. For this example,
we’ll change the SET number to 1, and then advance to the next parameter by pressing the CURSOR button.
The ENTRY value is now ready to be changed. Using the VALUE
knob, we’ll change the ENTRY value to 5, and then hit the CURSOR
button again to advance to the PRESET.
Now we’re ready to change the PRESET entry. Again using the VALUE
knob, we’ll change the PRESET to 23.
If no further editing is required, we can now exit this mode by hitting
the MASTER button.
This places us back where we started in Performance Sets. There are no parameters highlighted, and the
MASTER button is lit. Preset 23 - LUCKY MAN is the active preset, ready for playing.
To return to Preset mode, press the PRESET button. The preset displayed will be the last preset selected in
the Performance Set.
Pressing the MASTER button again will return you to the last used master menu entry.
Page
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Slim
Phatty
User’s
Manual
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The
User
Interface
Activating the Arpeggiator and Latch
Turning the Arpeggiator ON/OFF
When a preset has the Arpeggiator function enabled, you turn the Arpeggiator ON and OFF by pressing the
VALUE encoder switch (you must be in PRESET mode to engage the Arpeggiator).
When the Arpeggiator is ON, an ‘A’ will appear on the bottom line of the display:
With the Arpeggiator ON, any note or group of notes you play will be sequenced according to the settings
in the Arpeggiator menu. To turn the Arpeggiator OFF, simply press the VALUE encoder. The Arpeggiator
will switch OFF and the display will revert to the previous view:
NOTE:
The
VALUE
encoder
switch
is
still
used
in
MASTER
Mode
to
step
through
the
presets
in
Performance
Sets.
This
means
that
if
a
preset
selected
from
the
MASTER
Mode
Performance
Sets
has
the
Arpeggiator
function
enabled
and
you
wish
to
turn
the
Arpeggiator
ON
for
that
preset,
you
will
need
to
return
to
PRESET
Mode
first,
and
then
press
the
VALUE
encoder
switch
to
activate
the
Arpeggiator.
Turning the Arpeggiator Latch ON/OFF
When the Latch function is enabled in the Arpeggiator menu and the Arpeggiator is switched ON, pressing the ENTER/STORE button turns the Latch ON. When the Latch is ON, an ‘L’ will replace the ‘A’ on the
bottom line of the display:
As long as the Latch is ON, the Arpeggiator will keep looping in its current state. Any new note or group of
notes will initiate a new note sequence based on the Arpeggiator Menu settings. If any notes are played and
held while the Latch is ON, playing additional notes adds to the current list of notes to be arpeggiated. If all
notes are released, the first new note played will initiate a new note sequence.
To turn the Latch OFF, simply press the ENTER/STORE button. The Latch will switch OFF and the ‘L’ in the
display will be replaced by an ‘A’, indicating that the Arpeggiator is still active:
NOTES:
1.
When
the
Latch
is
ON,
you
can
turn
the
Arpeggiator
ON/OFF
using
the
VALUE
encoder
switch.
2.
If
the
Arpeggiator
Mode
is
‘One-­shot’
when
the
Latch
is
ON,
the
Arpeggiator
will
make
one
pass
of
the
note
sequence
and
then
stop.
3.
When
the
Arpeggiator
is
switched
OFF,
the
ENTER/STORE
button
will
revert
to
the
default
action
of
initiating
a
Preset
Save
sequence.
Page
52
Slim
Phatty
User’s
Manual
-­
The
User
Interface
Arpeggiator Examples
The Arpeggiator takes the currently played note or group of notes and forms an arpeggio based on the
Arpeggiator Menu settings. Here are some simple examples of the Arpeggiator function:
Example 1. Pattern = UP, Octaves = 1, Mode = LOOP
PLAY & HOLD NOTE
THE ARPEGGIATOR PLAYS
C3
C3, C4, C3, C4...
Add E3
C3, E3, C4, E4...
Add G2
G2, C3, E3, G3, C4, E4, G2...
Add A3
G2, C3, E3, A3, G3, C4, E4, A4, G2...
Release E3
G2, C3, A3, G3, C4, A4. G2...
Example 2. Pattern = DN, Octaves = 1, Mode = LOOP
PLAY & HOLD NOTE
THE ARPEGGIATOR PLAYS
C3
C4, C3, C4, C3...
Add E3
E3, C3, E4, C4, E3...
Add G2
E3, C3, G2, E4, C4, G3, E3...
Add A3
A3, E3, C3, G2, A4, E4, C4, G3, A3...
Release E3
A3, C3, G2, A4, C4, G3, A3...
Example 3. Pattern = UP, Octaves = 1, Mode = BACK-FORTH
PLAY & HOLD NOTE
THE ARPEGGIATOR PLAYS
C3
C3, C4, C3, C4...
Add E3
C3, E3, C4, E4, C4, E3, C3, E3...
Add G2
G2, C3, E3, G3, C4, E4, C4, G3, E3, C3, G2, C3...
Add A3
G2, C3, E3, G3, A3, G3, C4, E4, A4, E4, C4, G3...
Release E3
G2, C3, G3, A3, G3, C4, A4, C4, G3...
Example 4. Pattern = ORDERED, Octaves = 1, Mode = LOOP
PLAY & HOLD NOTE
THE ARPEGGIATOR PLAYS
C3
C3, C4, C3, C4...
Add E3
C3, E3, C4, E4...
Add G2
C3, E3, G2, C4, E4, G3, C3...
Add A3
C3, E3, G2, A3, C4, E4, G3, A4, C3...
Release E3
C3, G2, A3, C4, G3, A4, C3...
Page
53
Slim
Phatty
User’s
Manual
-­
The
User
Interface
How the SP handles MIDI
When you adjust any one of the SP’s four analog edit controls, MIDI Continuous Controller (CC) messages are generated and transmitted on the MIDI Out connector. The information contained in these
MIDI messages varies according to the parameter assignment for that analog edit control. For example,
when the front panel LFO RATE switch is selected, the analog edit control in the Modulation Section
generates MIDI CC data corresponding to the LFO Rate parameter (CC#03). MIDI CC messages are
also generated when you adjust Preset parameter values in the menus; this gives you total control of all
SP sound parameters via MIDI.
The tables on the following pages list all MIDI CC messages and values for the Slim Phatty.
NOTES:
1.
The
SP
sends
and
receives
7-­bit
MIDI
CC
messages
for
all
parameters
except
for
the
Modulation
Wheel
and
Filter
Cutoff,
which
receive
high-­resolution,
14-­
bit
MIDI
CC
messages.
This
allows
for
finer
control
and
smoother
changes
for
these
parameters.
For
these
two
parameters,
the
MSB
indicates
the
‘regular’
CC
number,
and
the
LSB
indicates
the
high-­resolution
‘fine’
control
value.
If
you
are
only
sending
7-­bit
MIDI
CC
messages
to
the
SP,
use
the
MSB
channel
number
by
itself
for
these
two
parameters.
2.
The
Arpeggiator
Clock
Rate
is
set
by
two
MIDI
CC
messages
that
correspond
to
coarse
and
fine
clock
rates.
The
coarse
rate
is
set
by
CC#04
in
increments
of
3
BPM
over
a
range
of
21-­320
BPM,
and
the
fine
rate
is
set
by
CC#36
in
increments
of
0.1
BPM.
To
set
the
clock
rate,
first
set
the
coarse
rate
by
dividing
the
target
BPM
by
three;
the
integer
result
(the
whole
number)
will
be
the
CC#04
value.
Then
set
the
fine
clock
rate
by
subtracting
the
coarse
BPM
value
from
the
target
value
and
multiplying
the
result
by
10.
This
will
be
the
CC#36
value.
For
example,
to
set
the
Arpeggiator
Clock
Rate
to
121.7
BPM:
Determine
the
MIDI
CC
coarse
value
by
dividing
the
target
BPM
by
3:
The
CC#04
value
is
‘40’
(=120
BPM)
Determine
the
MIDI
CC
fine
value
by
subtracting
the
coarse
BPM
value
from
the
target
value:
Then
multiply
the
result
by
10:
The
CC#36
value
is
‘17’
121.7/3
=
40.566
121.7
-­
120
=
1.7
1.7
*
10
=
17
For
CC#04
=
40
and
CC#36
=
17,
the
SP’s
display
will
show
‘121.7
BPM’.
(Note
that
in
order
to
display
the
internal
BPM
on
the
SP’s
LCD,
the
Arpeggiator
must
be
ON
and
the
Arpeggiator
Clock
must
be
set
to
‘INT’.)
3.
The
MIDI
CC
assignments
shown
for
each
section
are
over-­ridden
when
Pot
Mapping
is
enabled
in
that
section.
For
more
on
programming
and
enabling
Pot
Mapping,
see
page
38.
Page
54
Slim
Phatty
User’s
Manual
-­
The
User
Interface
Filter
Oscillators
Modulation
Interface Panel
SECTION
CONTROL/PARAMETER
FUNCTION
CC
VALUE/RANGE
MASTER
Master mode switch
-
-
PRESET
Preset mode switch
-
-
CURSOR
Navigation control
-
-
ENTER
Data entry control
-
-
GLIDE ON/OFF
Turns Glide ON/OFF
65
0 (OFF), 64 (ON)
OCTAVE UP
Octave increment switch
-
-
OCTAVE DOWN
Octave decrement switch
-
-
LFO RATE
Adjusts the LFO frequency
3
0 – 127
AMOUNT
Adjusts the modulation amount
6
0 – 127
SOURCE
Selects the modulation source
68
0 (TRI), 16 (SQUARE)
32 (SAW), 48 (RAMP)
64 (FILT ENV), 80 (OSC2)
DESTINATION
Selects the modulation destination
69
0 (PITCH), 16 (FILT)
32 (WAVE), 48 (OSC2)
LFO SYNC SOURCE
Selects the LFO synchronization source
102
0 (INT), 64 (MIDI CLK)
LFO SYNC CLOCK DIV
Sets the LFO synchronization clock divider
103
See table for list of values
MOD SOURCE 5
Selects the Mod 5 Source
104
0 (FILT), 64 (S&H)
MOD SOURCE 6
Selects the Mod 6 Source
105
0 (OSC2), 64 (NOISE)
MOD DEST 2
Selects the second mod destination
106
0 (OFF), 25 (PITCH)
50 (FILT), 75 (WAVE)
100 (OSC2)
OSC 1 OCTAVE
Sets the octave of oscillator 1
74
16 (16’), 32 (8’)
48 (4’), 64 (2’)
WAVE
Sets the waveform of oscillator 1
9
0 – 127
OSC 1 LEVEL
Adjusts the volume level of oscillator 1
15
0 – 127
GLIDE RATE
Sets the portamento rate time
5
0 – 127
1-2 SYNC
Turns oscillator sync ON/OFF
77
0 (OFF), 64 (ON)
OCTAVE
Sets the octave of oscillator 2
75
16 (16’), 32 (8’)
48 (4’), 64 (2’)
OSC 2 FREQ
Adjusts the frequency of oscillator 2
10
0 – 127
WAVE
Sets the waveform of oscillator 2
11
0 – 127
OSC 2 LEVEL
Adjusts the volume level of oscillator 2
16
0 – 127
PITCH BEND UP AMT
Selects the pitch end UP amount
107
0 – 127
PITCH BEND DN AMT
Selects the pitch bend DOWN amount
108
0 – 127
CUTOFF
(SEE NOTE 1)
Adjusts the filter cutoff frequency
19 (MSB)
51 (LSB)
0 – 127
RESONANCE
Adjusts the filter resonance parameter
21
0 – 127
KB AMOUNT
Adjusts the amount of pitch CV affecting the cutoff
22
0 – 127
EG AMOUNT
Adjusts the EG amount affecting the cutoff
27
0 – 127
OVERLOAD
Adjusts the amount of filter overdrive
18
0 – 127
FILTER POLES
Selects the number of filter poles
109
0 (1), 32 (2), 64 (3), 96 (4)
FILTER VELOCITY SENS
Sets the amount of filter velocity sensitivity
110
See table for list of values
Slim Phatty MIDI CC messages
Page
55
CONTROL/PARAMETER
FUNCTION
CC
VALUE/RANGE
ATTACK
Adjusts the filter envelope attack time
23
0 – 127
DECAY
Adjusts the filter envelope decay time
24
0 – 127
SUSTAIN
Sets the filter envelope sustain level
25
0 – 127
RELEASE
Adjusts the filter envelope release time
26
0 – 127
ATTACK
Adjusts the volume envelope attack time
28
0 – 127
DECAY
Adjusts the volume envelope decay time
29
0 – 127
SUSTAIN
Sets the volume envelope sustain level
30
0 – 127
RELEASE
Adjusts the volume envelope release time
31
0 – 127
EGR RELEASE ON/OFF
Sets the state of the EGR Release parameter
111
0 (OFF), 64 (ON)
EGR LEGATO
Sets the state of the EGR Legato parameter
112
0 (ON), 43 (OFF)
86 (RESET)
ARPEGGIATOR ENABLE
Enables/disables the Arpeggiator
113
0 (OFF), 64 (ON)
ARP RUN/STOP
Starts and stops the Arpeggiator
90
0 (OFF), 64 (ON)
ARP CLOCK RATE
(SEE NOTE 2)
Sets the Arpeggiator Clock Rate
4 (coarse)
36 (fine)
0 – 127
ARP CLOCK SOURCE
Sets the Arpeggiator Clock Source
114
0 (INT), 43 (LFO)
86 (MIDI)
ARP CLOCK DIVISIONS
Sets the Arpeggiator Clock Divider
115
See table for list of values
ARP RANGE (OCTAVES)
Sets the Arpeggiator Octave Range
116
0 (-3), 19 (-2)
38 (-1), 57 (0), 71 (+1)
90 (+2), 109 (+3)
ARP PATTERN
Selects the Arpeggiator Pattern
117
0 (UP), 43 (DOWN)
86 (ORDER)
ARP MODE
Selects the Arpeggiator Mode
118
0 (LOOP)
43 (BACK/FORTH)
86 (ONCE)
ARP LATCH ENABLE
Enables/disables the Arpeggiator Latch
119
0 (OFF), 64 (ON)
ARP LATCH/UNLATCH
Sets the Latch/Unlatch status
91
0 (OFF), 64 (ON)
VOLUME
Volume Control
7
0 – 127
KEYBOARD NOTE
PRIORITY
Selects the Keyboard Note Priority
88
0 (GLOB), 32 (LOW)
64 (HIGH), 96 (LAST)
MOD WHEEL
(SEE NOTE 1)
Modulation Performance Control
1 (MSB)
33 (LSB)
0 – 127
Arpeggiator
Envelope Generator
SECTION
Slim Phatty MIDI CC messages
Output
Keybd
Response
Slim
Phatty
User’s
Manual
-­
The
User
Interface
Mod Wheel
Function
Page
56
Slim
Phatty
User’s
Manual
-­
The
User
Interface
TIME VALUE
CLOCK DIVIDER
(SP DISPLAY)
VALUE
1/32 note
1/32
0
Dotted 1/32 note
1/32 DOT
8
1/16 note
1/16
16
Dotted 1/16 note
1/16 DOT
24
1/8 note
1/8
32
Dotted 1/8 note
1/8 DOT
40
Quarter note
1/4
48
Dotted quarter note
1/4 DOT
56
Half note
1/2
64
Dotted half note
1/2 DOT
72
Whole note
WH
80
Whole note + quarter note
WH + 1/4
88
Whole note + half note
WH + 1/2
96
Whole note + dotted half note
WH + 1/2 DOT
104
Whole note + whole note
WH + WH
112
MIDI CC values for the LFO and Arpeggiator Clock Divider (CC#103 & CC#115)
FILTER VELOCITY
SENSITIVITY
VALUE
-8
0
-7
12
-6
19
-5
26
-4
33
-3
40
-2
47
-1
54
0
61
+1
68
+2
75
+3
82
+4
89
+5
96
+6
103
+7
110
+8
117
MIDI CC values for Filter Velocity Sensitivity (CC#110)
Page
57
Slim
Phatty
User’s
Manual
-­
Appendices
APPENDICES
Appendix A - LFO Sync Modes
There are two LFO Sync Modes: INTERNAL and MIDI CLOCK.
INTERNAL:
When the LFO Sync Mode is set to ‘INTERNAL’, the LFO rate is controlled directly via the MODULATION
knob (when the LFO RATE panel button is selected), or by Tap Tempo, or by sending a MIDI CC#3 command with a value between 0-127 (MIDI CC#3 controls the LFO RATE).
When the Tap Tempo function is engaged, the internal LFO Rate is adjusted directly by tapping the LFO
RATE button. You can also adjust the LFO rate using the MODULATION control as normal, and this will
override the rate set by Tap Tempo. Note that the LFO RATE panel button will continue to blink, indicating
that Tap Tempo is still active - you can tap in a new tempo at any time. To disengage Tap Tempo mode, press
and hold the LFO RATE button. The LFO Rate will remain at the last rate you selected.
MIDI CLOCK:
When the LFO Sync Mode is set to ‘MIDI CLOCK,’ the LFO rate is synchronized to incoming MIDI Clock
pulses, with one LFO cycle equal to the note duration set by the LFO SYNC CLOCK parameter. The Slim
Phatty must have a MIDI Input enabled in the MIDI Setup menu in order to receive MIDI Clock. The Slim
Phatty has both USB and standard DIN MIDI inputs, and can receive MIDI Clock signals on either input. It is
recommended not to send different clock signals to both inputs simultaneously, unless you want some very
strange LFO signals to result!
If you change the Sync Mode from ‘INTERNAL’ to “MIDI CLOCK” while the SP is not receiving a MIDI
clock signal, the actual LFO rate will not change right away; it will continue at the same rate. However, the
LFO rate is no longer being controlled by the internal LFO clock. This means that if you try to control the
LFO Rate from the panel knob or send a MIDI CC# 3 message while the LFO Sync Mode is set to MIDI
CLOCK, the actual rate of the LFO will not change. NOTE: These actions still update the internal “LFO
Clock rate” parameter, but this parameter is offline while the LFO Sync MODE is set to ‘MIDI CLOCK’. If
you change the LFO Sync Mode back to ‘INTERNAL’, the rate of the LFO will jump to the internal LFO
Clock rate.
If the LFO is synchronized to a MIDI Clock pulse and the MIDI Clock is stopped, the LFO will continue at
the last MIDI Clock rate it received. If you hear a change in the rate of the LFO when you stop sending a
MIDI Clock signal, it is a sign of jitter or instability in your MIDI Clock source. The Slim Phatty performs a
running average of the clock pulses it receives, so the more stable your MIDI Clock source, the smoother
the resulting LFO waveform will be. Very unstable clock sources can cause distortion in the LFO waveform,
due to the constant LFO Rate corrections required to stay in sync with an unstable timing signal.
When the Tap Tempo is engaged and a valid tempo is tapped in, Tap Tempo overrides MIDI Clock sync for
the LFO. The LFO reverts to the MIDI Clock rate when Tap Tempo is disengaged.
Page
58
Slim
Phatty
User’s
Manual
-­
Appendices
Appendix B - Arpeggiator Clock Source
There are three Arpeggiator Clock Sources: Internal (INT), LFO, and MIDI Clock (MIDI). Detailed
descriptions of these clock source options appears below.
INTERNAL:
When the Arpeggiator Clock Source is set to INTERNAL, the Arpeggiator runs at the internal Arpeggiator
Clock rate. This defaults to the clock rate saved in the currently-active preset. You can change the internal
Arpeggiator clock rate by using the MODULATION control, or by Tap Tempo, or by sending a MIDI CC#90
command with a value in the range 0-127. While the arpeggiator is running, you can change its internal
clock rate by selecting the LFO RATE panel button and adjusting the MODULATION control. The lower
line of the Little Phatty LCD will display ‘ARP XXX BPM’, showing the tempo of the arpeggiator clock. Note
that due to the shared controls, you cannot use the MODULATION control to adjust the internal LFO
Rate while the Arpeggiator is running in this mode. However, you can still adjust the LFO Rate remotely by
sending a MIDI CC#3 command.
When the Tap Tempo function is engaged, the Arpeggiator Clock is adjusted directly by tapping the LFO
RATE button. You can also adjust the Arpeggiator Clock using the MODULATION control (provided that
prior to engaging Tap Tempo, the MODULATION control was set to adjust the Modulation Rate and not
the Amount). Adjusting the Arpeggiator Clock in this manner will override the rate set by Tap Tempo. Note
that the LFO RATE panel button will continue to blink, indicating that Tap Tempo is still active - you can
tap in a new Arpeggiator Clock at any time. To disengage Tap Tempo mode, press and hold the LFO RATE
button. The Arpeggiator Clock will remain at the last rate you selected.
LFO:
When the Arpeggiator Clock Source is set to LFO, the Arpeggiator rate is defined as one whole note
per LFO cycle. Unlike Internal mode, you can adjust the internal LFO Rate directly from the panel while
the Arpeggiator is running. The Arpeggiator Clock Divider (CLK DIV) determines how many notes the
Arpeggiator plays per LFO cycle. Note that you can still choose either Internal or MIDI Sync to be the LFO
Clock source, independent of this setting. The Arpeggiator will follow the LFO rate in either case.
MIDI:
When the Arpeggiator Clock Source is set to MIDI, the Arpeggiator rate is directly synchronized to
incoming MIDI clock. If there is no MIDI clock signal present, the arpeggiator will not play (and in fact, you
will not hear any notes from the SP keyboard!). The Arpeggiator Clock Divider (CLK DIV) determines how
many notes the Arpeggiator plays per measure.
PERFORMANCE
TIPS:
1.
When
the
Arpeggiator
Clock
Source
is
set
to
‘INT’,
you
can
use
the
Tap
Tempo
function
to
get
clock
rates
that
fall
outside
the
minimum
and
maximum
rates
available
from
the
MODULATION
control.
2.
When
the
Arpeggiator
Clock
Source
is
set
to
‘MIDI’,
if
the
Latch
is
enabled
and
a
latched
arpeggio
pattern
is
playing,
you
can
stop
the
MIDI
clock
and
the
pattern
will
stop
playing;
when
you
restart
the
MIDI
clock,
the
latched
pattern
is
retained
and
it
will
resume
playing
again.
Page
59
Slim
Phatty
User’s
Manual
-­
Appendices
Appendix C - The Calibration Preset
The SP has a specific Calibration Preset that is stored in a non-volatile memory location labeled ‘CA’ (this
preset location appears after preset 99). The Calibration Preset is a single-oscillator squarewave tone that
plays Oscillator 1 at full level. This preset is used primarily for the SP’s AutoTune function, but it can also be
used for tuning the SP with an external tuner. Since the CA preset can be modified like any other preset, it’s
also useful as a default starting point for preset development. Note that the Calibration Preset cannot be
saved to the CA memory location, but it can be saved to any other preset location (00-99).
The tables below list the default values of the Calibration Preset (bold text is used to indicate Precision
Mode values).
Envelope Generator
Filter
Oscillators
Page
60
PARAMETER
VALUE
LFO RATE
PARAMETER
VALUE
0
FILTER POLES
4
AMOUNT
0
EGR RELEASE
ON
SOURCE
SQUARE
GATE
LEGATO ON
DESTINATION
WAVE
FILTER SENSITIVITY
0
OSC 1 OCTAVE
16’
MOD SOURCE 5
FILT
WAVE
2048
MOD SOURCE 6
OSC2
OSC 1 LEVEL
4095
PB UP/DN
+2 / -2
GLIDE RATE
1726
MOD DEST2
OFF
1-2 SYNC
OFF
OCTAVE
16’
OSC 2 FREQ
2048
WAVE
2048
OSC 2 LEVEL
0
CUTOFF
4095
RESONANCE
0
KB AMOUNT
2701
EG AMOUNT
2048
OVERLOAD
0
ATTACK
0
DECAY
0
SUSTAIN
2048
RELEASE
0
ATTACK
0
DECAY
0
SUSTAIN
4095
RELEASE
0
SECTION
Advanced Preset
Parameters
Modulation
SECTION
Slim
Phatty
User’s
Manual
-­
Appendices
Appendix D - Accessories
To further enhance the functionality and appearance of the Slim Phatty, Moog Music offers the following
optional accessories. For complete information on everything listed here, including pricing and ordering info,
see your Moog dealer, or visit www. moogmusic.com
Rack Ears
For those who wish to rack mount their SP, Moog Music offers matching metal rack ears for the Slim
Phatty. Ships with the required washers and screws.
Wood Frame
For those who wish to use their Slim Phatty as a table-top module, Moog Music offers a custom wood
frame that enhances the look of the SP and provides that classic vintage vibe.
MP-201 Multi-Pedal
The MP-201 Multi-Pedal is a programmable four channel CV/MIDI/USB foot pedal controller featuring
four Analog Control Voltage Outputs, four independent LFOs, MIDI In, Out & MIDI over USB, MIDI Clock
Sync & Tap Tempo, User Editable Presets, and Programmable Heel & Toe Voltages. Plug one into the Slim
Phatty and experience the Power of the Pedal!
EP2 Expression Pedal
The EP2 Expression Pedal is the finest expression pedal available. Its smooth action gives it the accuracy
musicians need for precise, playable control. The heavy construction (2.5 lbs) provides a solid feel, and an
output level control allows you to adjust the expression range of the pedal.
CP-251 Control Voltage Processor
The CP-251 Control Voltage Processor offers a number CV processing options that can be used with
any Slim Phatty, Moogerfooger analog effects module, or other voltage-controlled gear. The CP-251
provides a dual waveform LFO, Noise Generator, and Sample-and-Hold circuit, as well as two active
Attenuators, a Lag Processor, a CV Mixer and a 4-way Multiple. This powerful combination allows you to
modify, mix, and distribute control voltages to produce the incredible variety of sounds and effects that
analog synthesizers are famous for.
VST Little Phatty Editor
The VST Little Phatty Editor is a VST-format software application that provides full control and editing
of presets and performance controls on your Little Phatty/Slim Phatty via MIDI from within your
VST-compatible host application. It allows total management of custom sounds directly within your
sequencing or music production environment. All parameters are fully automatable, giving you the ability
to dynamically program the Little Phatty/Slim Phatty to respond to your music (VST-compatible host
required).
Little Phatty Editor/Librarian Software
The ultimate software tool for editing and organizing Little Phatty/Slim Phatty presets. The Editor/
Librarian software allows you to send, receive, edit, organize and archive individual presets or preset
banks. A single edit screen provides access to all of the preset parameters–including Advanced Preset
functions like Pot Mapping, Filter Poles and Modulation Programming–simplifying the editing process while
maximizing your creative potential.
Page
61
Slim
Phatty
User’s
Manual
-­
Appendices
Appendix E - Tutorial
For those who are new to the world of electronic music, let’s take a few moments to go through the basics
of sound and synthesis.
Sound is simply the audible change in air pressure. When we perceive
sound, our ears are responding to variations in air pressure that happen to occur in our range of hearing. The rate of these variations is
called the Frequency, which is measured in cycles per second, or Hertz
(Hz). Generally, our ears can hear frequencies from about 20 Hz (on
the low end) to about 20,000 Hz (on the high end). The frequency of
a sound corresponds to its pitch. A low frequency corresponds to a
low-pitched sound (such as a bass) and a high frequency sound corresponds to a high-pitched sound (such as a piccolo).
A second perception of sound is its volume or loudness. Loud sounds
create big fluctuations in air pressure, while soft sounds create small
fluctuations. The measurement of these fluctuations is called the
Amplitude, which is measured in Decibels (dB).
A third perception of sound is its tone color, also known as its timbre. There is no standard of measurement
for timbre, so instead we use familiar terms to describe the tone color of a sound – bright or dull, buzzy or
mellow, tinny or full. The tone color is a function of the harmonic content of the sound. Sounds that are
bright and buzzy have a lot of harmonics, while sounds that are muted and dull have few harmonics.
Harmonics are mathematically related overtones of the base pitch. To explain what that means, let’s consider an example: if the base pitch is 100 Hz, harmonics will occur at 200 Hz (2 x 100), 300 Hz (3 x 100),
400 Hz (4 x 100), etc. The levels of the harmonics are always much lower than the level of the base pitch,
and they decrease as the frequency goes up, so a 200 Hz harmonic will be louder than a 300 Hz harmonic,
which will be louder than a 400 Hz harmonic, and so on. Note that there are some sounds that contain
overtones that are not mathematically related to the base pitch. These include the ‘metallic’ sounds created
by percussion instruments like cymbals, gongs and chimes, and noise sounds like wind or white noise. The
overtones of these sounds are called ‘enharmonic’, as they don’t fit neatly into a mathematical relationship
with the base pitch.
Using the electrical circuits in synthesizers, we can manipulate the three parts of sound (pitch, volume and
timbre) to create new sounds and simulate existing ones. This process is called Synthesis. There are a
number of ways to synthesize sound electronically (including frequency modulation, granular, phase
distortion and additive to name but a few), but the method used most often is called Subtractive Synthesis.
In Subtractive Synthesis, you start with signals rich in tone color, and then eliminate (i.e. subtract) frequencies
to achieve the desired sound.
A synthesizer design based on subtractive synthesis typically consists of three main components and three
auxiliary components. The main components are the Oscillator, Filter and Amplifier, and the auxiliary
components are the Keyboard controller, Envelope Generator, and Low Frequency Oscillator.
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The Subtractive Synthesis Model
The Oscillator is the starting point of Subtractive Synthesis, for it is here that the initial sound is created. The
oscillator creates electrical vibrations which function in a manner similar to the strings of a guitar; they create the
signal source that the rest of the system will use to modify and shape the sound. The key oscillator parameters
are pitch and waveform.
The pitch of the oscillator is primarily determined by the keyboard, which creates specific pitches based on an
equal-tempered scale (more about the keyboard later).
The waveform determines the harmonic richness of the audio signal. There are four basic waveforms common
to most synthesizers: sawtooth, square, triangle and sine.
The sawtooth wave is the richest sounding of the four waves. It contains all
of the harmonics, and has a bright, buzzy sound. Sawtooth waves are ideal
for brass and string sounds, bass sounds and rich accompaniments.
The square wave possesses a hollow sound compared to the sawtooth,
owing to the fact that it contains only odd harmonics. This hollow
characteristic is ideal for distinctive lead and sustained (pad) sounds.
An interesting aspect of the square wave is that the waveshape can be
changed to make the top and bottom parts asymmetrical, creating a pulse
wave. By changing the shape of the wave, new harmonics are introduced.
Pulse waves are ideal for creating clavinet-like sounds, but are also useful
for creating lush pads. Many synthesizers allow you to dynamically control
the shape, or ‘width’ of the pulse wave using modulation sources such as a
low frequency oscillator (LFO). This type of waveform control is known as
‘pulse width modulation’, or PWM.
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Like the square wave, the triangle wave only contains odd harmonics,
but the levels of the harmonics in a triangle wave are much less. The
triangle wave has a soft, slightly buzzy sound that is suitable for highpitched leads (like a flute) or adding a beefy sub-bass to bass sounds.
The sine wave is the purest waveform of them all. It has no harmonics,
so it produces a very pure tone. Because of this, sine waves generally
aren’t used as primary audio signals, but are often used to reinforce or
enhance other waves. They are also used as modulation sources.
Synthesizers often have more than one oscillator, and each oscillator usually has its own frequency and
waveform and level (volume) parameters. Several oscillators make possible rich and complex sound source
configurations. Some synthesizers also permit external audio signals to serve as sound sources, allowing you
to combine them with the oscillators, or process the external audio by itself using the synthesizer components.
The combined sound sources are routed to the Filter, the circuit that removes frequencies. Although there
are several types of filters, the Little Phatty offers just one, but it’s a very important one: the Lowpass filter.
By definition, a Lowpass filter removes high frequencies while allowing low frequencies to pass through. The frequency at which the filter
works to remove high frequency signals is called the Cutoff frequency.
Above the cutoff, frequencies are gradually reduced according to the
filter’s ‘slope’, which is a measure of how well the filter works. The
slope of a filter is expressed in decibels per octave (dB/Oct). The Little
Phatty filter is rated at 24 dB/Oct, which creates a dramatic reduction
in unwanted frequencies. This is a highly desirable quality for subtractive
synthesis.
Another important filter parameter is the filter resonance. Resonance amplifies the frequencies at the
cutoff frequency, emphasizing any signal frequencies that appear there. It’s possible to adjust the resonance
control to the point where the filter actually oscillates. When this occurs, the oscillation frequency is the
same as the cutoff frequency.
The Filtered signal is routed to the Amplifier, which controls the gain (volume) of the signal. The Amplifier
controls the articulation of a sound, turning it on and off as you play. The Amplifier is usually paired with
an Envelope Generator (described below). The gain of the amplifier follows the contours of the Envelope
Generator signal, shaping the sound from start to finish.
The Oscillator, Filter and Amplifier are voltage controlled, meaning that they respond to changes in voltages.
For the Oscillator, it means the higher the voltage, the higher the pitch. For the Filter, it means the higher the
voltage, the higher the cutoff frequency. For the Amplifier, this means the higher the voltage, the greater the
volume. Since each of the three main components respond to a voltage, the entire synthesis system thus
has a common control element. This provides great flexibility for sound programming, and allows auxiliary
components, like Envelope Generators and Low Frequency Oscillators (which generate control voltages) to
further vary the sound.
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Returning to our Subtractive Synthesis model, the first of the auxiliary components is the keyboard. The
keyboard provides a familiar musical instrument ‘interface’ that produces a control voltage and trigger signal
whenever a key is pressed. The level of the control voltage signal is a function of which key is pressed - the
higher up on the keyboard you play, the higher the level of the control voltage.
The keyboard’s control voltage signal is commonly routed to the oscillators to control the pitch, and it can also
be routed to other voltage-controlled components like the filter, to vary the cutoff frequency. The keyboard
trigger signal is routed to the Envelope Generators to trigger the envelopes.
The second auxiliary component is the Envelope Generator, or EG. The
EG makes no sound by itself. Rather, it creates a time-varying control
voltage that is typically used to control the gain of the amplifier, or the
cutoff frequency of the filter. Many synthesizers, including the Little
Phatty, provide several EG’s for independent envelope control of the
amplifier and filter circuits.
The EG is triggered from a Gate signal that is generated every time a
key is pressed on the keyboard. Once triggered, as long as the key is
held down (i.e. the Gate signal is present), the EG envelope will evolve
according to the control settings.
The SP’s Envelope Generators have four stages that can be set individually:
Attack – The time to go from zero volts to the maximum voltage (the fade in time).
Decay – The time to go from the maximum voltage to the Sustain level.
Sustain – The maximum level of the envelope after completing the attack and decay stages (if the
key is held). If the sustain time is zero, the envelope consists of just the attack and decay
stages, and the Release control has no effect.
Release – The time to go back to zero volts when the key is released (the fade out time).
The last auxiliary component is the Low Frequency Oscillator, also known
as the LFO. The LFO operates like the main oscillators in almost all
respects, but generally at a much lower frequency. LFO’s are typically used
to send modulation control signals to the main components. For example,
if you route a 6Hz LFO signal to an oscillator, it will produce vibrato by
varying the pitch of the oscillator. If you send that same LFO signal to
the amplifier, and you’ll get tremolo. LFO’s are used to create cyclical
variations in the sound, making the sound more dynamic and interesting.
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So there you have it - the six basic components that make up a synthesizer based on the subtractive
synthesis model. Keep in mind that most ‘subtractive’ synthesizers often include more than one of each
component. This is especially true of the oscillators and envelope generators (the Little Phatty has two of
each), but may also be true of filters, amplifiers and LFO’s. For example, the Moog Voyager has three oscillators, two filters, two amplifiers, an LFO, two extensive modulation sections, and the Voyager’s third oscillator
can act as an additional LFO. Synthesizers that offer more than one of each type of component provide
a broader palette for sound creation, resulting in sounds with a greater complexity, variation, and depth.
Nonetheless, even a simple analog synth like the SP can be used for incredibly expressive sounds given solid
programming and playing technique.
So what is the best way to configure and program these synthesis components effectively? The answer
could fill a book’s worth of explanations and examples. Two such recommended books on this subject are:
“Power Tools for Synthesizer Programming” by Jim Aiken, available from Backbeat Books
“Analog Synthesis” by Reinhard Smitz, available from Wizoo Publications
You can also learn a lot from examining the factory presets in detail. The Little Phatty’s presets were crafted
by some of the best sound designers in music today, and you can learn their secrets simply by exploring the
individual parameters that makeup the sound. Just dial up a few presets and dig in!
As with all musical instruments, practice, exploration and experimentation are an important part of achieving great results. Spend a little time getting to know your new instrument - your efforts will be rewarded!
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Appendix F - MIDI Implementation Chart
MIDI Implementation Chart
Moog Music
Slim Phatty Analog Synthesizer
FUNCTION
Date: 10/1/10
Version 1.0
TRANSMITTED
RECOGNIZED
REMARKS
Default
Changed
1
1-16, OFF
1
1-16, OFF
Default
Messages
Altered
3
X
X
4*
X
X
X
0-127
X
X
O
X
After touch
X
X
Pitch Bend
X
O
Programmable from 0 to ±12 semitones
Control change
O
O
1, 3-5, 6, 7, 9-11, 15,16, 18, 19, 21-31, 33, 36,
53, 65, 68, 69, 74, 75, 77, 88, 90, 91, 102-119
O
00 - 99
O
00 - 99
System Exclusive
O
O
System Commands
Song Position
Song Selection
Tune
X
X
X
X
X
X
Clock
Commands
X
X
O
O
Local Off
All Notes Off
Active Sense
System Reset
X
O
X
X
X
O
X
X
Basic channel
User selectable
Mode
Note number
* Note priority is user selectable
Velocity
Note ON
Note OFF
Program change
True Number
System Real Time
Receives Timing Clock
Receives START, CONTINUE & STOP
Aux messages
Legend:
O = Yes
X = No
Modes: Mode 1 - Omni On, Poly
Mode 2 - Omni On, Mono
Mode 3 - Omni Off, Poly
Mode 4 - Omni Off, Mono
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Appendix G - Service and Support Information
Moog Limited Warranty
Moog Music warrants its produces to be free of defects in materials or workmanship and conforming to
specifications at the time of shipment for a period of one year from the date of purchase. During the warranty period, any defective products will be repaired or replaced, at Moog Music’s option, on a return-to-factory basis. This warranty covers defects that Moog Music determines are no fault of the user. In countries
outside of the USA, contact the Moog authorized distributor listed on our web site (www.moogmusic.com)
for service.
Returning your Product to Moog Music
You must obtain prior approval in the form of an RMA (Return Material Authorization) number from Moog
Music before returning any product. You can request an RMA number on-line using the ‘Product Register’
link on the Moog Music home page or call us at (828) 251-0090. The Slim Phatty must be returned in the
original inner packing including the foam inserts. The warranty will not be honored if the product is not
properly packed. Once packed, send the product to Moog Music Inc. with transportation and insurance
charges paid.
What we will do
Once received, we will examine the product for any obvious signs of user abuse or damage as a result of
transport. If the product has been abused, damaged in transit, or is out of warranty, we will contact you with
an estimate of the repair cost.
How to initiate your warranty
Please initiate your warranty on-line at www.moogmusic.com by clicking on the “Product Register” tab. If
you do not have web access, fill out the all the information on the included warranty card and mail to:
Moog Music, Inc.
Attn: New Product Registration
2004-E Riverside Dr.
Asheville, N.C. USA 28804
Appendix H - Caring for the Slim Phatty
Clean the Slim Phatty with a soft, moist cloth only – do not use solvents or abrasive detergents. Heed the safety
warnings at the beginning of the manual. Don’t drop the unit. If you are shipping your Slim Phatty to the factory
for servicing, we recommend using the original shipping carton, or an ATA approved Road Case. Shipping the
Slim Phatty in a non-ATA or packaging other than the original carton will void the warranty.
AN
IMPORTANT
NOTE
ABOUT
SAFETY:
Do
not
open
the
chassis.
There
are
no
user
serviceable
parts
in
the
Slim
Phatty.
Maintenance
of
the
Slm
Phatty
synthesizer
should
be
referred
to
qualified
service
personnel
only.
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Appendix I - Using the CP-251 with the Slim Phatty
The Moogerfooger® CP-251 Control Processor makes an ideal companion to the Slim Phatty synthesizer.
The CP-251 provides an LFO with two waveforms (Triangle/Square), a Sample & Hold circuit with two outputs (stepped/smooth), a Lag Processor, a Noise source, a Mixer and two Attenuators. The CP-251 greatly
expands the sonic palate of the SP, allowing for the creation of interesting new sonic textures.
Here are some possible configurations for using the CP-251 with the Slim Phatty. Grab some patch cords
and try these suggestions!
Simple configurations using the LFO from the CP-251:
To create a steady Vibrato effect:
- Using a ¼” patch cable, connect the CP-251 LFO Triangle output to an Attenuator Input.
- With another ¼” patch cable, connect the Attenuator Output to the SP’s Pitch CV jack.
On the CP-251, set the LFO Rate control to 6 Hz (about 1 o’clock), and adjust the Attenuator to about 0.5
on the dial (a very low amount). This configuration will produce the mild pitch wavering known as vibrato.
Setting the LFO Rate considerably higher will result in wild FM textures.
To create Tremolo:
- Using a ¼” patch cable, connect the CP-251 LFO Triangle output to an Attenuator Input
- With another ¼” patch cable, connect the Attenuator Output to the SP’s Volume CV jack.
On the CP-251, set the LFO Rate control to 6 Hz (about 1 o’clock), and adjust the Attenuator to 10 on the
dial. This will produce the pulsating amplitude modulation known as tremolo. Adjust the LFO Rate to taste.
For a sharp, volume-chopping effect, use the LFO Square wave output in place of the LFO Triangle out.
To produce Timbral Modulation:
- Using a ¼” patch cable, connect the CP-251 LFO Triangle output to an Attenuator Input
- With another ¼” patch cable, connect the Attenuator Output to the SP’s Filter CV jack.
On the CP-251, set the LFO Rate control to 6 Hz (about 1 o’clock), and adjust the Attenuator to about 2
on the dial. This will produce a pleasing tone modulation as the filter cutoff frequency is modulated. Setting
the LFO Rate considerably higher will result in wild timbral textures, while a very low setting will create a
slowly evolving filter sweep. For a “random stepping” filter effect, use the S&H Out 1 in place of the LFO
Triangle out.
Using the multiple jack on the CP-251, you can simultaneously route the LFO or S&H modulation signal to
the SP’s Pitch, Filter and Volume inputs all at once, or split the modulation signal using the multiple jack and
route it into both Attenuators to have two separately controllable modulation sources for the SP.
Pitch Transposition:
Using an Expression Pedal (like the Moog EP-2), you can program the CP-251 to transpose the SP’s pitch to
any interval desired and have it ready any time you need it. Here’s the connection:
- Connect the EP-2 to an Attenuator Input.
- With another ¼” patch cable, connect the Attenuator Output to the SP’s Pitch CV jack.
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To set the transposition interval, press the EP-2 footpedal all the way down and slowly adjust the Attenuator
on the CP-251 while striking a note on the SP’s MIDI controller. The pitch will go up as you raise the
Attenuator level. Rock the EP-2 pedal between full up and full down positions to hear the difference in
pitch, and adjust the Attenuator until the desired interval is reached. This will give you a foot-activated transposition controller you can use at any time during a performance!
Noise as a Control Voltage:
You can use the CP-251 Noise source as a control voltage by simply routing it to any of the SP’s CV inputs
(Pitch, Filter and Volume), but a better method is to route the Noise through an Attenuator first:
- Using a ¼” patch cable, connect the CP-251 Noise output to an Attenuator input.
- With another ¼” patch cable, connect the Attenuator output to one of the SP’s CV jacks.
This will allow you to raise or lower the Noise level as desired, adding just a touch of noise to add realism to
a sound, or a blast of noise for extreme sonic effect.
Combining Control Voltages:
Using the CP-251 Mixer, you can add the LFO and Noise source together for use as a combined control
voltage signal, giving a result similar to using the Modulation Mix control on the original Minimoog:
- Using a ¼” patch cable, connect the LFO Triangle output to the CP-251 Mixer 1 input
- Using another ¼” patch cable, connect the Noise output to the CP-251 Mixer 2 input
- With another ¼” patch cable, connect the Mixer “+” output to the SP’s Filter CV jack.
Set the CP-251 Mixer 1 and Mixer 2 inputs to ‘5’ on the dial, and set the Master level to ‘10’. Adjust the Mixer 1 and 2 levels to balance the LFO and Noise signals, and use the Master level to set the effect intensity.
You can also use the Mixer’s Offset Voltage control by itself to provide an additional steady CV signal, or
combine it with the LFO and Noise. An interesting effect is to mix the LFO and Noise source together with
a negative offset (set the Mixer Offset control to about 9 o’clock) and route the Mixer Output to the SP
Filter Input. As the Mixer’s Master control is raised, the SP’s Filter Cutoff will be lowered (due to the negative offset voltage) while the combined LFO/Noise signal is introduced.
Noise as an Audio Source:
Don’t forget that you can use the CP-251 Noise source as an audio source to add interesting artifacts to
an existing sound (for example, creating the illusion of ‘breath’ in an instrument) or process the noise just by
itself to create wind, surf, or ‘pole’ noises. Simply route the CP-251 Noise output through an attenuator and
then into the SP’s Audio In jack. Noise never sounded so good!
We’ve just scratched the Surface
These are just a few of the synthesis possibilities afforded by the Slim Phatty and the CP-251. Other CV
equipment like our Moogerfooger® analog effects can be added to expand the sonic potential of the
Slim Phatty. Other CV compatible equipment can be connected as well. Just keep in mind that you should
always connect a source to a destination, and that you shouldn’t combine multiple CV to a single destination
without a mixer. We encourage you to experiment, as there are many possibilities for exploring synthesis
– whether you are trying to duplicate a sound or effect you heard, or if you are trying to make a sound that
nobody’s heard before. Remember - experimentation is part of the fun!
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Appendix J - Specifications
Type:
Programmable monophonic analog
synthesizer w/100 presets
Synth Engine:
Oscillator Section:
Oscillator 1:
Octave: 16’, 8’, 4’, 2’
Wave: Continuously variable
(triangle/sawtooth/square/pulse)
Level: 0 to 100%
Oscillator 2:
Frequency: ± 7 semitones
Octave: 16’, 8’, 4’, 2’
Wave: Continuously variable
(triangle/sawtooth/square/pulse)
Level: 0 to 100%
Glide Rate: 0 to 100%
Oscillator Sync ON/OFF
Filter Section:
Cutoff: 20Hz to 16KHz
Resonance: 0 to Self-oscillation
Keyboard Amount: 0 to 100%
Filter Env. Amount: -100% to +100%
Overload: Variable pre and post
distortion, adds +6dB signal
boost at full level.
Envelope Generator Section (x2):
Attack Time: 0.001 to 10 seconds
Decay Time: 0.001 to 10 seconds
Sustain Level: 0 to 100%
Release Time: 0.001 to 10 seconds
Modulation Section:
LFO Rate: 0.2 Hz to 50 Hz
Source: LFO triangle, LFO square,
LFO sawtooth, LFO ramp,
Filter EG, Oscillator 2
Destination: Pitch, Oscillator 2,
Filter, Wave
Amount: 0 to 100%
Performance Controls:
Modulation Wheel: 0 to 100%
Fine Tune: ±3 semitones
Glide ON/OFF
Octave UP/DOWN: ±2 octaves
Output ON/OFF
Master Volume
Analog Edit Potentiometers (4)
User Interface:
LCD Display, 2 x 16 characters
Mode switches:
Master
Preset
Selection/Navigation controls:
Cursor
Enter/Store
Value encoder (with pushswitch)
Side Panel:
AC Power Inlet (universal power supply,
100-250 VAC, 50-60 Hz,
power consumption: 12 Watts)
Power ON/OFF
Audio Out
Ext. Audio In (accepts +4dBu line level signal)
Control Voltage Inputs:
Pitch CV: -5 to + 5V
Filter CV: -5 to +5V
Volume CV: 0 to +5V
Keyboard Gate: +5V trigger
MIDI In, Out, Thru on MIDI DIN
MIDI In, Out on MIDI USB
Outputs:
Monophonic Audio Out (¼” TS)
Headphone jack (¼” TRS)
Dimensions:
17” x 5.25” x 4.32”
(431.8 mm x 133.4 mm x 109.8 mm)
Weight:
5.75 lb (2.6 kg)
Operating System;
Flash upgradeable via MIDI SysEx
Specifications subject to change without notice
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Glossary
GLOSSARY
Glossary
Here are a few key terms that cover the basics of sound generation as used in the Little Phatty synthesizer.
ADSR – Abbreviation for Attack, Decay, Sustain and Release, the four stages of an envelope control voltage.
Amplitude – The strength of a sound’s vibration measured in Decibels (dB). Amplitude corresponds to the
musical term Loudness.
Continuous Controller (CC) – A type of MIDI message used to transmit control commands. These commands are digital control signals for parameters such as volume, vibrato and panning.
Control Voltage – Control voltages (also called CVs) are used in analog synthesizers to affect changes in the
sound. In the case of pitch, pressing a key on the keyboard sends a control voltage that determines the
pitch of the oscillators. The keyboard CV is set to produce an equal tempered scale. As you play up the
keyboard, the CV is raised and the pitch increases. The pitch can also be affected by other CV sources,
like an LFO, often used to produce vibrato. Other major synthesizer components that respond to CV’s
include the filter (the higher the CV, the higher the filter cutoff frequency) and the amplifier (the higher
the CV, the higher the gain, or volume).
Envelope – An envelope describes the contours that affect the characteristics of a sound (pitch, tone and
volume) over time. For example, when a string is plucked, its amplitude is suddenly very loud, but then
dies out gradually. This describes the Volume envelope of the sound. We observe that the initial part of
the plucked sound is very bright, but then the brightness fades away. This describes the Tonal envelope
contour. We also hear the frequency of the sound go slightly higher when the string is plucked, and then
drop slightly as the note fades. This is the pitch envelope contour. A synthesizer can create these kinds
of changes by applying electrically generated envelopes to oscillators (affecting pitch), filters (affecting
tone) and amplifiers (affecting volume).
Envelope Generator – A circuit that generates an envelope signal. The envelope generator creates a timevarying signal that can be applied to any voltage-controlled circuit. The Envelope Generators in the
Little Phatty have four adjustable segments: Attack, Decay, Sustain and Release, also sometimes referred
to as ADSR. The Attack, Decay and Release segments are specified as time parameters, while the
Sustain segment is a simply a level setting. Attack specifies the onset time of the envelope. For example,
the sound of a plucked string starts suddenly, meaning its volume envelope has a fast attack time. Decay
specifies how quickly the onset of the envelope fades into the sustained portion. Sustain is the level at
which the envelope sustains after the initial transient (the attack and decay portion). Finally, Release determines how long the envelope takes to fade away. An Envelope Generator uses a trigger to start and
stop the ADSR envelope. This trigger is called a gate signal, and it’s produced whenever a key is pressed
on the keyboard. The gate signal turns on and stays on as long as a key is held down. When the key
is released, the gate signal turns off. When the gate is on, the Envelope Generator is triggered and the
envelope signal moves through the Attack and Decay segments and settles at the Sustain level as long as
the gate signal is on. When the gate goes off, the release segment of the envelope begins. A new gate
signal retriggers the Envelope Generator.
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Glossary
EEPROM – EEPROM stands for ‘Electrically Erasable Programmable Read Only Memory’. This is a type of
digital memory used to store information, even after the power is turned off. In the Little Phatty, the
EEPROM is used to store global settings and presets, and operating system parameters such as tuning
information.
Filter – A circuit that removes some frequencies and allows other frequencies to pass through the circuit.
A filter has a cutoff frequency that determines the point at which frequencies begin to be removed. A
lowpass filter is one in which frequencies above the cutoff frequency are removed and all frequencies
below the cutoff are passed through. A highpass filter is one in which frequencies below the cutoff
frequency are removed and frequencies above the cutoff are passed through. A bandpass filter has two
cutoff frequencies that define a frequency band, outside of which the frequencies are removed.
Frequency – The rate of vibration in sound measured in Hertz (Hz or cycles per second). The average hearing
range of the human ear is from 20 to 20,000 Hz. Frequency corresponds to the musical term ‘pitch’, but the
two terms are not always interchangeable. Frequency is an objective measurement of a sound, while pitch
is the perception of a sound, low, high, or mid-ranged. A low frequency corresponds to a low-pitched sound
such as a bass; a high frequency sound corresponds to a high-pitched sound such as a piccolo. In music, a
change in pitch of one octave higher equals a doubling of the frequency.
Frequency Modulation – Also known as FM, Frequency Modulation describes the technique of using one
oscillator to modulate the frequency of another. In FM, the modulating oscillator is called the ‘modulator’,
while the other oscillator is known as the ‘carrier’. The carrier oscillator is the one you hear. When
the modulator frequency is very low (about 6Hz), the effect is described as vibrato. As the modulator
frequency is raised into the audio range, new modulation frequency components are created, and the effect
is perceived as adding new overtones to the carrier signal.
Glide – Also called portamento, is the slowing down of pitch changes as you play different notes on the
keyboard. Certain acoustic instruments, like the trombone or the violin, create this effect when the
performer adjusts the tubing or string length. The speed of the glide is the glide rate. In synthesizers,
a Glide Rate control determines the speed of the glide between notes.
Harmonic – A sound is made up of simple vibrations at many different frequencies (called harmonics) that give
a sound its particular character. This corresponds to the musical term timbre or tone color. A harmonic
sound, such as a vibrating string, is one in which the harmonics are mathematically related by what is called
the harmonic series. These sounds are typically pleasing to the ear and generally the consecutive vibrations
have the same characteristic shape or waveform. An enharmonic sound, such as a crash cymbal, is one
in which the harmonics are not mathematically related. Their waveforms look chaotic. White noise is an
enharmonic sound that contains equal amounts of all frequencies.
LED (Light Emitting Diode) – An electrical component that lights up when a voltage is applied.
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Glossary
Low Frequency Oscillator – Also called an LFO, this is a special type of oscillator that generates signals
primarily below the range of human hearing (generally below 20 Hz). LFOs are typically used as a
source of modulation. For instance, an LFO with a triangle waveform, set to about 6 Hz and modulating
the pitch of a VCO results in vibrato. Changing the LFO waveform to a square wave will result in a trill.
An LFO modulating a VCA with a triangle wave creates tremolo.
LUT (Lookup Table) – A Lookup Table is a type of software data structure used to provide basic reference
information to the operating system. In the Little Phatty, LUT’s store tuning values and other
parameters used by the operating system to provide precise and efficient operation.
Mixer – A circuit for combining multiple sound sources or signals.
Modulation – Modulation is the use of a control voltage to shape a tone. Modulation has a source, a destination,
and an amount. This could be as simple as the filter cutoff of a VCF (a modulation destination) being
changed by the front panel cutoff control (the source), or as complex as mixing multiple CVs together to
modulate filter cutoff. Modulation is used in synthesis to create complex sounds and add variation.
Noise – A random audio signal having no fundamental, and where all the harmonics have equal strength (more
or less). Noise can be used as either an audio or modulation source. When used as an audio source, noise
can be used by itself to synthesize explosions or wind noises, or can be mixed with other waveforms to
create noise artifacts, such as breath sounds. When used as a modulation source, noise can introduce
instabilities to a sound, such as a ‘pitch cloud’ effect when noise modulates an oscillator. In the Little Phatty,
noise is available as a modulation source only, but external noise sources (such as from the CP-251 Control
Processor) can be applied through the SP’s Audio Input.
Oscillator – A circuit that electronically “vibrates”. When used as a sound source, an oscillator is the electronic
equivalent of a vibrating reed, or string. When amplified, an oscillator produces a pitched sound whose
frequency is determined by one or more control voltages. Changes to these voltages correspond to
changes in pitch. An oscillator’s vibration can have different shapes or waveforms, such as a triangle,
sawtooth, or square wave. The Little Phatty has two oscillators for generating sounds.
Pitch – The subjective perception of sound. A bass guitar generates low pitches, while a flute generates high
pitches.
Pole (or poles) – A term referring to the design of a filter circuit. Each filter pole adds 6 dB/Octave of
attenuation to the filter response, so while a single pole filter has a 6dB/Octave response, a 4-pole filter (like
the one in the Little Phatty) has a 24dB/Octave response.
Sample and Hold (S&H) – A circuit that generates a random control voltage at regular intervals. Traditional
sample and hold circuits employ white noise as a signal source, taking periodic samples of this signal
and holding that sample (a voltage level) until the next sample is taken. Since the signal source is noise
(a random audio signal), the output of the S&H circuit is also random. The sampling interval is typically
controlled by a low frequency oscillator (LFO). By adjusting the speed of the LFO, the speed of the S&H
circuit can be varied. In the Little Phatty, digital circuitry is used to simulate an equivalent S&H circuit, and
the LFO Rate control sets the speed. The S&H output is available as a programmable modulation source.
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Glossary
Sound – Audible vibrations of air pressure. For electronic sounds such as those produced by a synthesizer,
loudspeakers are used translate the electrical vibrations into the changes in air pressure which we perceive
as sound.
Subtractive synthesis – A method of creating tones using harmonically rich (bright) source material, and then
removing (or in some cases emphasizing) various frequency components to create the desired sound.
Synthesis – The generation of sound by electronic means, where the programmer or performer has the ability to
change the pitch, volume, timbre and articulation.
Timbre – Pronounced ‘tamber’, it refers to the quality of a sound by its overtones. An unprocessed sawtooth
wave has a bright timbre, while a triangle wave has a mellow timbre.
Tremolo – Technically a form of low frequency amplitude modulation, tremolo is a smooth audible pulsing of
volume. In synthesizers, tremolo is produced when a 5-6Hz LFO triangle or sine wave signal is applied to a
voltage controlled amplifier.
Waveform – The shape of an oscillator’s vibration. This determines its timbre. Commonly used waveforms
in subtractive synthesis are sawtooth, triangle, square, or rectangular. Different waveforms have different
timbres. A sawtooth has the greatest number of harmonics, and sounds bright and buzzy. A square wave
has only odd harmonics, and sounds bright, but hollow, like a clarinet. A rectangular wave can vary in shape,
but typically has a bright but thin sound, and a triangle wave’s harmonics are so low in amplitude that it
sounds muted and flutelike.
VCA – Short for Voltage Controlled Amplifier, a VCA is an amplifier circuit where the gain is a function of the
control voltage. In the Little Phatty, the VCA is paired with the Volume ADSR envelope generator to specify
the articulation of a sound. Another CV source for the VCA in the Little Phatty is the Volume CV Input.
VCF – Short for Voltage Controlled Filter, a VCF is a filter circuit where the filter cutoff frequency is a function of
the control voltage. A VCF is used to control the timbre of a sound. In the Little Phatty, the VCF is paired
with the Filter ADSR envelope generator for dynamic control. Other CV sources for the VCF include the
Keyboard Amount, Modulation Matrix and Filter CV Input.
VCO – Short for Voltage Controlled Oscillator, a VCO is an oscillator circuit where the oscillator frequency is
a function of the control voltage. In the Little Phatty, the VCO is primarily controlled from the keyboard.
Other CV sources for the VCO include the Modulation Matrix, and Pitch CV Input.
Vibrato – Technically a very low frequency modulation, vibrato is a smooth, mild pitch warble. In synthesizers,
vibrato is produced when a 5-6Hz LFO triangle or sine wave signal is applied to a voltage controlled
oscillator, causing the pitch to deviate slightly above and below the base frequency.
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SLIM PHATTY PRESETS
Slim Phatty Presets
A list of the Slim Phatty Presets appears on the next page. Many of the preset names are self-explanatory,
some are for fun, and all are all worth auditioning. As you listen to the presets, don’t forget check out the
Mod Wheel function for additional performance control.
Slim Phatty Preset Contributors:
Rosser Douglas
Dom Kane
Steve Dunnington
Slim Phatty User’s Manual
© Moog Music 2010, all rights reserved
Text and illustrations by Greg Kist and Steve Dunnington
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SLIM NOT SLIM
RIPSAW BASS
UNRULY LEAD
LITTLE LEAD
GRIND MY BASS
DEEP AND DARK
ANALOG DRUM
MINOR SLIDER
SYNC SEQ
BRITE LITE
SQUAREZ
REZZY PAD
COLD LEAD
DARK SIDE
ELECTRO SITAR
SLIPPERY FUNK
MELLO EDGE
FATTUS BOTTOM
CLICK BUG
EBB&FLOW LEAD
TRIANGLE SUB
PARALLEL MOOD
BACKWARDSISH
DIRTY CHEESE
BLIPZ SEQ
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MUSH MUSH
DISTURBER
SIMPLE DEEP
PULSE BASS 1
SPARKLE WAH
CUSHION BASS
ELECTROSAW
ARGURU
DEAD ROBOT
TRON BASS
GET PLUCKED
STAB ME
HOLD4FIZZ
OPEN UP
SAY WHAA
MOOG SOLO
DISTURBANCE
WAWAWEE
DARK BRIGHT
FOR HER LEAD
HARUMPH
HELON I
TRANSFORMER
NICHE
LANSING II
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STAR WRECK
KARATE
MARINE
MEANT4 DRONEY
NINTENDO
SUPER POWERS
MARINE G II
TEE PEE FUNK
QUIET JACOB
MIKEY DANCE
PLAY IN E MOD
FILT REZ KICK
GRITTY 9TH
DISSONANTTING
LEGATO SWEEP
HARD TINELEAD
DIRT BUBBLES
MASSIVEPWMMOD
CHEESE GRIT
BBQ SYNC
MOUTHFULL
GHOSTS FADE
REZZY DUALSAW
TINY THING
WAVE GLIDER
Slim Phatty Presets
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STINGER LEAD
DIRTY BEATING
GAME OVER
SLOW SUBSWEEP
MODVOX BASS
FILTER DRIPS
SMOOTH N HIGH
PULSEREZSWEEP
SEKSU BONGO
SIR WAH WHA?
SHARP SEQUE
PWM MOD BASTE
SAW U LEAD
SOURPUSS
PULSE BASS 2
MOD SHARD SEQ
SCALAR SYNC
BUBBLE BUTT
AGGROSYNCBASS
TOUCH GONG
SPACE LEAD
SNAPPY SAW
SIMPLE TRI
SIMPLE SQUARE
SIMPLE PULSE
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