programmable eq user`s guide

PROGRAMMABLE EQ
USER’S GUIDE
SA170
OVERVIEW
Thank you for purchasing the Source Audio Programmable EQ. The
Programmable EQ is a compact, 7-band digital equalizer with four user
preset locations. It uses high-precision processing combined with professional quality analog/digital converters for superior tone. The digital
nature of the unit offers a significant advantage over analog equalizers
in that presets can be easily saved and recalled. The MIDI input and Backpage features further extend the capabilities of the unit.
• Flexible Range: +/- 18dB of range over 7 bands. An 8th band at 62Hz can
be edited using the Octave Extend Backpage function.
• Small Footprint:
A compact, rugged, cast aluminum housing.
• State of the art DSP:
56-bit processing and crystal clear 24-bit
converters.
• Digital Flexibility:
Presets can be quickly saved and restored.
All presets can be accessed via the footswitch.
• Universal Bypass™: Selectable
bypass modes. Use either relay-based
True Bypass or buffered analog bypass.
• MIDI input: recall
remotely via MIDI.
presets, control parameters, and engage/bypass
2 | Overview of Features
CONNECTIONS
1. Power
To power the unit, connect the included 9V battery or connect a Source
Audio 9V power supply to the 9V DC jack.
Note: Use of a non-Source Audio power supply may damage the unit and
void the warranty.
2. Guitar/Audio Connections
The unit has ¼-inch mono input and output jacks for use with guitar, bass,
and other instruments.
Note: The unit will not power up until a ¼-inch plug is inserted into the
input. Don’t forget to unplug the cable from the input when the unit is not
in use—otherwise the battery will continue to drain.
3. MIDI input
The Programmable EQ also features a MIDI (Musical Instrument Digital
Interface) input which allows certain functions of the pedal to be accessed
remotely. See the MIDI implementation table (page 6) for more details.
Connections | 3
CONTROLS
EQ Display: The heart of the Programmable EQ is the 7-band graphic
equalizer display. The LED display shows the currently active settings of
the equalizer within a range of +/-18 decibels (dB) for each of the seven
accessible bands. The left and right arrow buttons select the frequency
band to be adjusted and the main encoder knob adjusts the level of the
selected band up or down. The center frequency (in Hz) of each band is
indicated at the bottom of the display.
Band Select Buttons: The band select buttons flank the display and are
indicated by left and right arrows. Press a corresponding button to select
a higher or lower frequency to be edited.
Note: The equalizer can be quickly “zeroed” by pressing the left and right
arrow buttons simultaneously.
Encoder: The main knob on the unit is an encoder style control that
allows incremental up or down level changes to the selected frequency
band in 1dB steps. The maximum range is +18dB and the minimum is
-18dB for each frequency band.
SELECT Button: Pressing the select button will scroll through the
four user presets. The display will update to show the saved equalizer
curve and output for each preset location. Also, the four LEDs above
the SELECT button will indicate which of the four presets is currently
selected.
4 | Controls
SAVE Button: Once a preset has been selected, it can be edited. When any
of the controls are changed from their saved value, the preset LEDs will
begin to blink to indicating that the preset has been edited. To save the
new settings, press and hold the SAVE button for two seconds. The preset
LED will blink 3 times quickly when the saving process is complete.
OUTPUT: This small knob adjusts the final output volume after the equalizer, it can be used to compensate the overall volume for any loss or gain
in the equalizer. The OUTPUT knob setting will be saved along with the
equalizer curve per preset. The OUTPUT knob is also illuminated by a
blue LED which will increase in brightness as the knob is turned up. This
way, the brightness of the OUTPUT knob will give some indication of the
output volume setting when scrolling through presets
ON/OFF Footswitch: Pressing and releasing the footswitch engages
or bypasses the unit. When engaged the ON/OFF LED will be lit. When
engaged the audio input will be routed through equalizer and the output
volume knob. When bypassed, the audio is routed through a hardwired
relay connection directly to the output. This is sometimes referred to as
“hardwire” or “true bypass.” There are no buffers or components between
the input and output in bypass.
The footswitch can also duplicate the function of the SELECT button.
Pressing and holding the footswitch will make the unit begin to scroll
through the four presets in the same manner as pressing the SELECT
button. Releasing the footswitch will stop the scrolling on the last selected preset.
Note: If the unit is currently bypassed (OFF) the footswitch scroll function
will engage when the switch is released. If the scroll function is used
while the pedal is engaged, the unit will audibly step through the four
presets and remain engaged when the switch is released.
Controls | 5
MIDI CONTROL
The Programmable EQ features a MIDI input that can be used to remotely
engage and bypass the unit as well as selecting presets. It also allows for
potential future firmware updates for feature changes or future interfacing with a software editor.
MIDI Implementation Table:
Parameter
Message Type
Enable Preset 1
Program Change
Data Value - Default*
001
Enable Preset 2
Program Change
002
Enable Preset 3
Program Change
003
Enable Preset 4
Program Change
004
Disable Preset – Bypass
Program Change
005
*The Programmable EQ can be configured to engage any of the four user presets from
any value Program Change. When saving a preset, the unit will assign the current preset
to the last Program Change value received. To assign a PC number to bypass, perform a
save while the unit is bypassed.
Parameter
Message Type
Data Value 1
Data Value2
Output
Continuous Controller
030
0–127
Engage/Bypass
Continuous Controller
031
<64 Bypass >=64 Engage
Output - Limited to Unity
Continuous Controller
032
0–127
Auto Scroll speed
Continuous Controller
033
0–127
Auto Scroll ON/OFF
Continuous Controller
034
<64 OFF >=64 ON
EQ Band level
Continuous Controller
035 – 042
0–127
The MIDI Channel is accessible as a Backpage parameter. See the next
section for details
6 | MIDI Control
Backpage Parameters
The Programmable EQ features an additional set of functions called
Backpage Parameters. These features can be accessed in Backpage
mode only. In this mode, the equalizer display takes on some secondary
functionality.
To enter Backpage mode, press the left arrow band select button and the
SAVE button simultaneously. The display will change to reflect the current
Backpage parameter settings. Like an equalizer band, use the left and
right buttons to select a column and use the encoder to change the value.
Backpage mode can be exited by pressing both save and left select buttons together again.
Backpage parameter labels
OE SW AS MC
+18
+18
0
0
-18
-18
125 250 500 1K 2K 4K 8K
PRESS
62
125
250
500
1K
2K
4K
BP
1
2
3
4
PRESS
OUTPUT
SAVE
SELECT
ON/OFF
(HOLD)
PRESET SELECT
Backpage Parameters | 7
In Backpage mode, the first four columns of the display are used to edit
four different parameters. Each parameter is denoted by a two letter abbreviation. They are as follows:
OE – Octave Extension: This parameter allows an 8th band to be added
to the equalizer, the 8th band is at a frequency of 62 Hz, one octave below
the normal low of 125 Hz. This frequency is especially helpful for use with
bass. The lowest position on the display indicates this features is off. The
next LED position up from the bottom indicates the octave extension is
enabled. After exiting backpage mode, the 62 Hz band can be accessed by
pressing the left band select button until the 125 Hz column is selected.
Pressing the left button again will shift the display and allow the 62 Hz
band to be displayed and edited by the encoder. Press the right band
select button to resume the normal 7-band view.
OE SW AS MC
+18
+18
0
Off
0
Enabled
-18
-18
125 250 500 1K 2K 4K 8K
62
125
250
500
1K
2K
4K
SW – Switching speed: This parameter controls scrolling speed when
1 through
2
3
4 presets or using the auto-scroll
using the footswitch to scroll
mode (see below). The full range of the display is used for this parameter.
Slowest speed is at the bottom and fastest at the top.
OUTPUT
SAVE OESELECT
SW AS MC
Fast
+18
+18
ON/OFF
0
Slow
0
-18
-18
(HOLD)
PRESET
125 250 500
1K 2KSELECT
4K 8K
62
8 | Backpage Parameters
1
2
3
125
4
250
500
1K
2K
4K
S – Auto-Scroll: This parameter enables/disables the auto-scroll funcA
tion. When in auto-scroll mode, the footswitch preset scroll will continue
to scroll automatically even after the footswitch is released. This can be
a fun way to get unique tremolo or sequencer sounds as the unit steps
through the four equalizer presets at a given programmable rate. The
rate of the scrolling is controlled by the switching speed (SW) parameter.
Auto-scrolling will stop when the footswitch is pressed again. Like the
OE function, this parameter uses the two bottom LEDs on the display to
indicate ON or OFF.
OE SW AS MC
+18
+18
0
0
On
-18
Off
-18
125 250 500 1K 2K 4K 8K
62
125
250
500
1K
2K
4K
MC – MIDI Channel: Use this parameter to edit the MIDI channel for the
1
2display
3
4 will numerically indicate the currently
Programmable EQ. The
selected channel from 1 to 16.
Note: Backpage parameters can be reset to factory
default values by
OUTPUT
SAVE SELECT
pressing both band select
left and right buttons simultaneously.
ON/OFF
OE SW AS MC
+18
+18
(HOLD)
PRESET SELECT
0
0
-18
-18
125 250 500 1K 2K 4K 8K
PRESS
62
125
250
500
1K
2K
PRESS
4K
BP
1
2
3
4
PROGRAMMABLE EQ
Backpage Parameters | 9
OUTPUT
UNIVERSAL BYPASS ™
The Programmable EQ features Universal Bypass allowing the user to
select a bypass mode that best suits their needs. Relay-based True Bypass
uses a small signal relay to provide a hardwire bypass. Alternatively,
buffered bypass uses analog switching and provides a consistent input
impedance and buffered output.
To switch between these two modes, press and hold the footswitch while
connecting a cable to guitar input. The ON/OFF LED will blink 3 times to
indicate that buffered bypass is selected. The LED will blink 2 times to
show that relay-based True Bypass is currently selected.
Note: Relay-based True Bypass is the default mode.
SPECIFICATIONS
Dimensions
• L: 4.5 inches (11.4cm)
• W: 2.5 inches (6.4cm)
• H: 2 inches (5.1cm)
Weight
• .625 lbs (.28 kg)
Power
• 80mA @ 9V max
• Negative tip power jack
Audio Performance
• 115dB Dynamic Range ADC
• 24-bit audio conversion
• 56-bit digital processing
• 1Mohm input impedance
• 2.2V RMS input range
If possible, dispose of the device at a recycling center. Do not
dispose of the device with the household waste.
For full compliance with EN 61000-4-6 standard, input cable must
be less than 3 meters in length.
10 | Specifications
LIMITED WARRANTY
Source Audio, LLC (hereinafter “Source Audio”) warrants that your new Source Audio
Programmable EQ Pedal, when purchased at an authorized Source Audio dealer in the
United States of America (“USA”), shall be free from defects in materials and workmanship under normal use for a period of one (1) year from the date of purchase by the
original purchaser. This Limited Warranty does not extend to the batteries which are
purchased as is. Please contact your dealer for information on warranty and service
outside of the USA.
Under this Limited Warranty, Source Audio’s sole obligation and the purchaser’s sole
remedy shall be repair, replacement, or upgrade, at Source Audio’s sole discretion, of
any product that, if properly used and maintained, proves to be defective upon inspection
by Source Audio. Source Audio reserves the right to update any unit returned for repair
and to change or to improve the design of the product at any time without notice. Source
Audio reserves the right to use reconditioned parts and assemblies as warranty replacements for authorized repairs. Any product repaired, replaced, or upgraded pursuant to
this Limited Warranty will be warranted for the remainder of the original warranty period.
This Limited Warranty is extended to the original retail purchaser. This Limited Warranty
can be transferred to anyone who may subsequently purchase this product provided
that such transfer is made within the applicable warranty period and Source Audio is
provided with all of the following information: (i) all warranty registration information
(as set forth on the registration card) for the new owner, (ii) proof of the transfer, within
thirty (30) days of the transfer, and (iii) a photocopy of the original sales receipt. Warranty
coverage shall be determined by Source Audio in its sole discretion. This is your sole
warranty. Source Audio does not authorize any third party, including any dealer or sales
representative, to assume any liability on behalf of Source Audio or to make any warranty
on behalf of Source Audio.
Warranty | 11
WARRANTY INFORMATION
Source Audio may, at its option, require proof of the original purchase date in the form
of a dated copy of original authorized dealer’s invoice or sales receipt. Service and
repairs of Source Audio products are to be performed only at the Source Audio factory
or a Source Audio authorized service center. Prior to service or repair under this Limited
Warranty, the purchaser must request from Source Audio a return authorization, which
is available at:
Source Audio LLC
120 Cummings Park, Woburn, MA 01801
(781) 932-8080 or at www.sourceaudio.net.
Unauthorized service, repair, or modification will void this Limited Warranty.
DISCLAIMER AND LIMITATION OF WARRANTY
DO NOT OPEN THE EFFECTS PEDAL UNDER ANY CIRCUMSTANCE. THIS WILL VOID THE WARRANTY.
THE FOREGOING LIMITED WARRANTY IS THE ONLY WARRANTY GIVEN BY SOURCE AUDIO AND IS
IN LIEU OF ALL OTHER WARRANTIES. ALL IMPLIED WARRANTIES, INCLUDING WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR ANY PARTICULAR PURPOSE, EXCEEDING THE SPECIFIC PROVISIONS OF THIS LIMITED WARRANTY ARE HEREBY DISCLAIMED AND EXCLUDED FROM THIS LIMITED
WARRANTY. UPON EXPIRATION OF THE APPLICABLE EXPRESS WARRANTY PERIOD, SOURCE AUDIO
SHALL HAVE NO FURTHER WARRANTY OBLIGATION OF ANY KIND, EXPRESS OR IMPLIED. SOURCE
AUDIO SHALL IN NO EVENT BE LIABLE FOR ANY SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES
SUFFERED BY THE PURCHASER OR ANY THIRD PARTY, INCLUDING WITHOUT LIMITATION, DAMAGES
FOR LOSS OF PROFITS OR BUSINESS OR DAMAGES RESULTING FROM USE OR PERFORMANCE OF
THE PRODUCT, WHETHER IN CONTRACT OR IN TORT. SOURCE AUDIO SHALL NOT BE LIABLE FOR ANY
EXPENSES, CLAIMS OR SUITS ARISING OUT OF OR RELATING TO ANY OF THE FOREGOING. Some
states do not allow the exclusion or limitation of implied warranties so some of the
above limitations and exclusions may not apply to you. This Limited Warranty gives you
specific legal rights, and you may also have other rights, which vary, from state to state.
This Limited Warranty only applies to products sold and used in the USA. Source Audio
shall not be liable for damages or loss resulting from the negligent or intentional acts of
the shipper or its contracted affiliates. You should contact the shipper for proper claims
procedures in the event of damage or loss resulting from shipment.
© SOURCE AUDIO LLC 120 CUMMINGS PARK, WOBURN, MA 01801 SOURCEAUDIO.NET
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