MPX 500 24-Bit Dual Channel Processor
User Guide
Unpacking and Inspection
After unpacking the unit, save all packing materials in case you ever need to ship the unit. Thoroughly inspect the modules and packing materials
for signs of damage. Report any damage to the carrier at once; report equipment malfunction to your dealer.
Communications Notice
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits
are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can
radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct
the interference by one or more of the following measures:
Reorient or relocate the receiving antenna
Increase the separation between the equipment and receiver
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected
Consult the dealer or an experienced radio/TV technician for help
Le présent appareil numérique de la classe B respecte toutes les exigences du Règlement sur le materiel brouiller du Canada.
Copyright 1999, 2000 Lexicon Inc.
All Rights Reserved.
06/00 • Lexicon Part No. 070-14116 • Rev. 1
Lexicon Inc.
3 Oak Park
Bedford MA 01730-1441
Telephone 781-280-0300
Fax 781-280-0490
www.lexicon.com
Table of Contents
Getting Started
Introduction ...................................................................... 1
Front Panel Overview ...................................................... 2
Setting Audio Levels
Rear Panel Connections .................................................. 4
Audio Connections • Footswitch
Basic Operation
The MPX 500 Display ...................................................... 7
Selecting and Loading Programs .................................... 8
Editing ............................................................................. 9
The "Adjust" Knob • Tap Tempo Functions:
Varying the rhythm • Audio Tap • Setting Tempo
via MIDI
Bypass ........................................................................... 12
Storing Programs ........................................................... 12
System Mode
System Mode Parameters ............................................. 15
Bypass • Patching • Program Load • Digital Output
MIDI OUT/THRU • MIDI Pgm Change • MIDI Clock
Receive • Tempo • MIDI Dumps
Program Descriptions
1 Plate ........................................................................... 22
2 Gate ........................................................................... 23
3 Hall ........................................................................... 24
4 Chamber ..................................................................... 25
5 Ambience .................................................................... 26
6 Rooms ........................................................................ 27
7 Tremolo ...................................................................... 28
8 Rotary ......................................................................... 29
9 Chorus ........................................................................ 30
10 Flange ....................................................................... 31
11 Detune ...................................................................... 32
12 Pitch .......................................................................... 33
13 Delay, Echo ..............................................................
About the Dual Programs ..............................................
14 Special FX ................................................................
15 Flange-Delay ............................................................
16 Pitch-Delay ...............................................................
17 Chorus-Delay ............................................................
18 Delay-Reverb ............................................................
19 Flange-Reverb ..........................................................
20 Pitch-Reverb .............................................................
21 Chorus-Reverb .........................................................
22 MonoSplitDly ............................................................
23 MonoSplitRvb .........................................................
24 Dual Mono ..............................................................
34
36
38
39
39
40
40
41
41
42
43
44
45
MIDI Operation
MPX 500 MIDI Behavior ................................................ 47
Using Program Change Messages for Program Load ... 48
Learning Continuous Controllers ................................... 49
Activating Bypass or Tap Functions with Program Change
Messages ............................................................... 50
Clearing a Learned Assignment .................................... 51
MIDI Clock ..................................................................... 52
MIDI Dumps ................................................................... 52
MIDI Implementation Chart ............................................ 53
Specifications
Getting Started
Introduction
Thank you for your purchase of the MPX 500 24-Bit Dual Channel Processor.
Powered by Lexicon’s proprietary Lexichip™, the MPX 500 has 240 presets with classic reverb
programs such as Ambience, Plate, Chamber and Inverse, as well as Tremolo, Rotary, Chorus,
Flange, Pitch, Detune, 5.5 second Delay and Echo. Dual-channel processing gives you two
independent effects in a variety of configurations: Dual Stereo (Parallel), Cascade, Mono Split and
Dual Mono.
A large graphics display and dedicated Edit knobs give you instant access to each preset’s
parameters and an easy Learn mode allows MIDI patching of front panel controls. In addition, tempocontrolled delays and modulation rates lock to Tap or MIDI clock, and Tap tempos can be controlled
by audio input, the front panel Tap button, dual footswitch, external MIDI controller or MIDI Program
Change.
Other features include a software-selectable MIDI OUT/THRU port, pushbutton or footswitch
selection of dry or muted audio output and a built-in power supply.
To make sure you get the most out of the MPX 500, be sure to read the manual.
Getting Started
Lexicon
Front Panel Overview
Store
Initiates store procedure.
(When pressed with Tap, activates MIDI Learn.)
Edit Pages
Accesses additional edit
pages. Embedded LED lights
to indicate program is altered
but not stored.
Display
LCD shows input type, real-time
meters, program and bank information, one page of four editable parameters, routing information, tempo rate.
Input Trim
Sets the level of the incoming analog signal.
System
Accesses System mode. Use EDIT
knob 1 to select parameters; knob 3
to change the parameter setting.
Load
Loads the selected program.
LED lights to indicate another
program is cued.
Tap/Cancel
Flashes for tempo-based
programs. Press twice to
set a tempo. Hold to have
audio input level or dialedin value determine tempo.
(When pressed with Store
activates MIDI Learn.)
PROGRAM
Selects programs. Push and
turn to select Banks.
EDIT
Knobs 1-4 adjust parameters
1-4 on the display.
Bypass
Mutes or bypasses the signal
depending on the setting of the
System Bypass parameter.
* The level indicators are at their minimum size when the incoming signal is low (more than 30dB below full scale). The highest level indicators
are highlighted when the signal approaches full scale.
2
MPX 500 User Guide
Getting Started
Setting Audio Levels
As with any audio product, it is good practice to first power on all outboard gear, then the
mixer, then any loudspeakers.
Input
1. First, bypass all effects. The System parameter, Bypass Mode must be set to pass dry audio.
To do this:
Press System to enter System mode.
Turn Edit Knob 1 to display Bypass Mode.
Turn Edit Knob 3 to select Dry.
Press System again to exit System mode.
Press Bypass.
2. With your highest level program material, start with a very low input level and advance it slowly.
3. When you reach audible distortion, or when the display clip indicators light and stay on, lower the
input level until the clip meters come on only on the highest peaks.
The Input Trim control allows the MPX 500 to be driven by an input level in the range of +20dBu
to +8dBu. The minimum setting (fully counterclockwise) should be optimal for +4dBu (balanced)
inputs. The maximum setting (fully clockwise) should be optimal for -10dBV (unbalanced) inputs.
Output
1. Press System to enter System mode.
Output Level (the first System parameter) will be displayed.
2. Turn Edit Knob 3 to set Output Level.
0dB should be unity gain for a +4dBu input device.
-12dB should be unity gain for a -10dBV input device.
3. Press System again to exit System mode.
3
Getting Started
Lexicon
Rear Panel Connections
POWER
Standard 3-pin IEC power
connector; 100-240V, 5060Hz automatic switching to
correct voltage range.
LCD Contrast
Adjusts display contrast.
Audio Connections
MIDI
Two 5-pin DIN MIDI connectors
are provided for MIDI IN and software selectable MIDI OUT/THRU.
DIGITAL I/O
RCA S/PDIF connectors.
INPUT
Balanced Tip-Ring-Sleeve and
XLR stereo inputs.
OUTPUT
Balanced Tip-Ring-Sleeve and
XLR stereo outputs.
FOOTSWITCH
1/4" TRS connector, for momentary contact footswitch, allows footswitch control
of front panel Tap and Bypass functions.
Use only a Tip/Ring/Sleeve connector.
Using a Tip/Ring connector will short the ring
and sleeve, which can hang the unit.
The MPX 500 produces effects from either mono or stereo sources. With mono sources, the dry signal
appears, along with audio effects, at both outputs. For instruments and sources with stereo outputs,
use both inputs. We recommend using the outputs in stereo whenever possible, but if mono output
is required, use either output jack.
Footswitch
A footswitch connected via the rear-panel footswitch jack allows control of Tap and Bypass. A
momentary footswitch can be wired to a tip-ring-sleeve connector. A stereo Y-connector allows two
identical single switches to be used.
Power off the MPX 500 before plugging in the footswitch. (Otherwise, Bypass will be enabled.)
4
MPX 500 User Guide
Getting Started
The MPX 500 can be used as two independent Effects Processors with the Dual Programs. Designate
two auxiliary sends on your console and connect one to the left MPX 500 input, and the other to the
right input. Refer to the Program Descriptions to take advantage of this configuration.
TRS to XLR
Dual Processor Setup with a Console
Modes of Operation
5
MPX 500 User Guide
Basic Operation
Basic Operation
The MPX 500 Display
The MPX 500 Program Select display shows detailed program information, including routing, the
current tempo setting, a full page of as many as four editable parameter settings, and real-time input
level meters.
Bank containing currently
loaded program
Number of currently loaded program
Number of cued program (if any)
Input Level meters
Incoming signal information
S (Stereo), L or R (Mono Left
or Right), D (S/PDIF) and
Sample Rate (44.1 or 48kHz)
Current tempo setting for delays
and status of tempo selection
Name of currently
(p=program-specific, g=global)
loaded program
Routing configuration of
the current program
As many as four editable parameters are shown on
a page. (Pressing the Edit Pages button repeatedly
cycles through all of the available pages.)
7
Basic Operation
Lexicon
Selecting and Loading Programs
MPX 500 programs are organized into 24 Banks plus a User Bank. (The programs are described in
detail later in this manual.) When powered on, the unit will display and load the last program used.
To display any other MPX 500 program, simply turn the front panel PROGRAM knob. The knob will
progressively select the rest of the programs in the current Bank, then proceed through each of the
remaining Banks. To jump between Banks, push the PROGRAM knob in while turning.
If the selected program is not the currently loaded program, the Load LED will light. After four seconds,
the display will revert to showing the current program, but the Load LED will remain lit to indicate that
the last selected program is cued for loading. The number of the cued program will appear highlighted
to the left of the name of the current Bank on the display. To load the cued program, press Load.
An AutoLoad feature is available which will cause selected programs to load automatically 3/4 second
after the knob stops turning. (See System Mode for information on activating this and other System
mode parameters.)
Turn PROGRAM to cycle through
all of the MPX 500 programs.
To select a specific program Bank, push
the PROGRAM knob in while turning.
When the selected program is different from the
currently running program, the Load LED will light.
Press to load the selected program.
8
MPX 500 User Guide
Basic Operation
Editing
Each MPX 500 program has as many as 16 editable parameters, organized into edit "pages" of as
many as four parameters each. The front panel Edit Pages button cycles through all of the available
pages for the current program.
Dedicated edit knobs corresponding to each page of displayed parameters make program adjustment
easy. Simply turn the knob (1-4) for the displayed parameter (1-4) you want to adjust. When you alter
a parameter value, it will be highlighted and the Edited LED will light to show that the program is
different than the currently running version. (These edit indicators will be turned off when you store
the new program, or if you load another program.) If you return to Program Select mode without storing
your changes, your edited version will still appear as the currently running program, but the Load LED
will light and the original version of the program will be cued.
Edited parameter values will be highlighted.
The current tempo will be
displayed (in BPM) if the
program contains tempobased parameters.
The Edited LED will light to
show that the program has
been changed from the
currently running version.
Pressing Edit Pages will display
another page of parameters.
The 4 front panel edit knobs correspond to the
displayed parameters. Position 1 on Page 1 always
contains a special custom control for easy editing.
9
Basic Operation
Lexicon
The "Adjust" Knob
A special control in each program lets you make quick adjustments to the most critical parameters
of the sound. We have positioned this custom control under Edit knob 1 on Page 1 of each program
and refer to it as the Adjust knob in this manual.
In many cases, this parameter controls several effect parameters simultaneously to provide simple
control of a complex editing process. In many Chamber and Room programs, for example, this
parameters controls the "liveness" of the space by changing decay, EQ and early reflections all at the
same time. For easy identification, this parameter name will always appear in parentheses, as:
(Livenes). When you turn the knob, the bottom display line will temporarily show a more complete
description of its function in the running program.
NOTE: As the Adjust knob can access and control more internal controls than the 16 displayed
parameters in each program, there may be instances where this control (or Tap) will modify a
parameter which is not displayed on any of the program's edit pages. In these instances, the Edited
LED will light, even though no displayed parameters are highlighted.
Tap Tempo Functions
Varying the Rhythm
The MPX 500 Tempo features allow you to set the delay times and modulation rates of tempo-based
programs to the beat of the music. There are several ways to set tempo (40-400BPM), each of which
is described below. No matter which method you select, the current tempo rate will be displayed in
the upper right corner of the display, and the embedded LED in the Tap button will flash in tempo
whenever a program with tempo-controllable parameters is loaded . You can set a global tempo for
all of the MPX 500 programs, or have each program stored with its own tempo. (See System Mode.)
The global (g) or Program (p) system parameter selection is shown to the right of the tempo display.
10
MPX 500 User Guide
When programs with tempo-based parameters
are loaded, the current tempo (in Beats per
Minute) is shown in the upper right corner of the
display.
Basic Operation
The Tap LED will flash in
the selected tempo.
To set the tempo from the front panel, simply press the Tap button (or a connected footswitch) twice
in time with the music. That’s your tempo. No more dialing up what “could be” the delay time in
milliseconds — just tap twice — the MPX 500 will figure out the time for you. When you want to change
tempo, just tap twice again in the new rhythm.
Audio Tap
You can also use audio input to set the tempo of the MPX 500 delay times.
1. Press and hold the Tap button until the Tempo display appears. (Using a footswitch lets you press
and hold Tap without taking your hands off your instrument. )
2. The message Detecting Audio will be shown, along with a list of parameters in the current
program which can be controlled by tempo. Play 2 short notes in rhythm to set the tempo.
When you release Tap, the message Use Knob 3 will be displayed to indicate that tempo can
now be further adjusted from the front panel. Just turn Edit knob 3 to dial in a tempo (in BPM).
3. Press Tap to exit this mode.
Many factory programs are stored with their own tempo rate. You can tap in a new tempo (and store
your version in a User location) or set the MPX 500 to always recall the last tempo used and apply
it to every program. (See System Mode for information on changing the MPX 500 default Tempo Mode
from Global to Program.)
11
Basic Operation
Lexicon
When you select Global Tempo from the MPX 500 System mode, the last tempo tapped in will be
applied to all programs with tempo-controlled parameters. (You will know if a program is tempocontrollable because the Tap button LED will flash when the program is loaded and the tempo rate
display will appear.)
Setting Tempo via MIDI
When used in conjunction with the Learn feature, Tap can be set remotely from any MIDI device. MIDI
controllers, such as Lexicon's MPX R1 Foot Controller, can be used to send Continuous Controller
messages or Program Changes to the MPX 500 or you can send Continuous Controller or Program
Change messages from the button and fader moves of many mixing consoles. The MPX 500 will
Learn these messages and allow you to set tempo via MIDI.
The MPX 500 can also receive and utilize MIDI Clock. So, when used with a MIDI sequencer or drum
machine, the MPX 500 automatically adjusts its internal tempo to match. (See MIDI Operation.)
Bypass
Pressing the front panel Bypass button will cause the MPX 500 to pass only unprocessed audio, to
mute completely, or to mute the inputs to the current effect.
A System Mode parameter determines which of these three options is in effect. (See System Mode.)
Bypass functions can also be activated by footswitch or via MIDI.
12
MPX 500 User Guide
Basic Operation
Storing Programs
When you want to save a program, press Store. The Store and the Tap/Cancel LEDs will light to
indicate that the MPX 500 store function is armed. (If you want to exit without saving the current
program, press Tap/Cancel at any time before completing the store operation.)
The first available location in the User Bank will be selected by default when Store is pressed. To
select a different location (including the location of a User program you want to overwrite), press and
turn PROGRAM to select another location in the User Bank.
The program will be displayed with its original name and a numeric suffix (1-9). You can keep this
default name, or use Edit knobs 1 and 3 to select character positions and assign characters to create
a different name.
Press Store to save the program with its new name. When the Store operation is complete, the new
program will automatically load (becoming the currently running program).
13
MPX 500 User Guide
System Mode
System Mode
System parameters and MIDI dumps are activated in System mode. To enter this mode, press
System. The System LED will light to indicate you are in System mode.
The adjustable parameters available in this mode are described on the following page. Edit knob 1
will select parameters, edit knob 3 will change the selected parameter's setting.
Use Edit knob 1 to select
System mode parameters.
Use Edit knob 3 to change
the selected parameter.
The System LED will
light when System
mode is active.
Except for MIDI dumps and reinitialization commands, which require confirmation to execute, system
parameter changes are effected immediately.
Pressing System again will return the unit to its previous running mode.
15
System Mode
Lexicon
System Mode Parameters
Parameter
Settings
Default Setting
Output Level
0dB to -24dB, Off
0dB
Input Source
Analog Stereo, Analog Mono L,
Analog Stereo
Analog Mono R, S/PDIF Digital
Clock Source
Internal 44.1K, Internal 48K, External (S/PDIF)
Internal 44.1K
Digital Output
Processed, Dry
Processed
Mix Mode
Bypass Mode
Program Load Mode
Global
Dry
Bypass Dry, Full Mute
Bypass Dry
Tempo Mode
Program, Global
Global
MIDI Patches
Enabled, Disabled
Enabled
MIDI Channel
Off, 1-16, Omni
1
MIDI Program Change
Enabled, Disabled
Enabled
MIDI Clock
Enabled, Disabled
Enabled
Out, Thru
Out
MIDI Out/Thru
16
Program, Global
Dry/Full Mute/Input Mute
Operating Mode
Normal, Locked, Demo
Normal
Memory Protect
Enabled, Disabled
Disabled
Auto Load
Enabled, Disabled
Disabled
Dump User Bank
-
-
Dump Current Program
-
-
Dump System Data
-
-
Clear User Bank
-
-
Factory Init
-
-
MPX 500 User Guide
System Mode
Output Level
This parameter appears by default whenever you press System to give you quick access to output
level settings.
Input Source
Allows you to specify the type of input. If S/PDIF Digital is selected and no digital signal is present,
the MPX 500 will mute and display an alert message.
Clock Source
Allows you to select 44.1kHz or 48kHz internal clock sources, or external (S/PDIF) clock source.
Digital Output
When Dry is selected, Analog In to Digital Out provides an auxiliary A/D converter.
Mix Mode
Determines whether the current Mix setting of the MPX 500 will be applied to all programs (Global),
or whether program-specific Mix levels are restored on each program load.
NOTE: A default Mix value is stored with each program. These individual stored values will take effect
when a program is loaded, if Mix Mode is set to Program — the Global mix setting will override the
individual stored settings if Mix mode is set to Global.
Bypass Mode
This parameter sets the Bypass button (or the footswitch, or MIDI controller assigned to Bypass)
to mute the inputs, to mute the inputs and outputs, or to bypass the processed audio (passing only
dry audio to the outputs).
Program Load Mode
This parameter determines whether the MPX 500 will engage full mute or simply bypass processed
audio while changing programs.
17
System Mode
Lexicon
Tempo Mode
Determines whether the current tempo of the MPX 500 will be applied to all programs (Global), or
whether program-specific tempos are restored on each program load.
NOTE: A default Tempo is stored with each program. These individual stored tempos will take effect
if Tempo Mode is set to Program — the Global tempo setting will override the individual stored
settings if Tempo mode is set to Global.
MIDI Patches
This parameter allows you to temporarily suspend (Disable) and restore (Enable) any Learned
patches.
MIDI Channel
Allows selection of a MIDI Channel for all MPX 500 messages (Learned, SysEx and Program
Change).
MIDI Program Change
The setting of this parameter determines whether or not the MPX 500 will recognize MIDI Program
Change messages for loading programs.
MIDI Clock
The setting of this parameter determines whether or not the MPX 500 will recognize MIDI Clock
messages.
MIDI Out-Thru
Sets the rear panel MIDI OUT/THRU jack for either MIDI OUT or MIDI THRU functionality.
NOTE: MIDI Dumps can only be performed when this parameter is set to MIDI Out.
18
MPX 500 User Guide
System Mode
Operating Mode
Allows the MPX 500 front panel controls to be locked into their current settings, or to be placed in
continuous program load cycle for demonstration purposes.
When Locked is selected, only the User Bank is available. Program Load Mode is set to Auto Load
and only Bypass, Program Select and System modes are available. Edit Mode is not available and
Tempo and Patches cannot be Learned.
Changes to this parameter take effect on the next power cycle.
Memory Protect
When enabled, this parameter prevents changes to system parameters and User programs.
Auto Load
When enabled, programs will load approximately 3/4 second after selection. When disabled, Load
must be pressed to load selected programs.
MIDI Dumps (Dump User Bank, Dump Current Program, Dump System Data)
These selections allow you to execute MIDI Dumps. See MIDI Operation.
Clear User Bank
Selecting this parameter will arm a reinitialization procedure that will erase the contents of the User
Bank and restore it to its factory state. Pressing Store will execute the procedure.
Factory Init
Selecting this parameter will arm a reinitialization procedure that will restore all of the adjustable
parameters in the MPX 500 to their factory default states. This includes all User programs, System
parameters and Learned patches. Pressing Store will execute the procedure.
19
MPX 500 User Guide
Program Descriptions
Program Descriptions
The 240 programs in the MPX 500 are designed to provide a full palette of high caliber ambience,
reverb, delay, pitch shift and other effects. As you audition the programs, be sure to vary the Adjust
parameter.
The Adjust parameter (Edit Page 1, Knob 1 in each program) has been carefully customized for each
individual program. In many cases it controls several effect parameters simultaneously to provide
simple control of a complicated editing process. In many Chamber and Room programs, for example,
Adjust controls the "liveness" of the space by changing decay, EQ and early reflections all at the same
time. This parameter has a range of 0-127 to make it compatible with MIDI control.
For easy identification, this parameter name will always appear in parentheses, as: (Livenes). When
you turn the knob, the bottom display line will temporarily show a more complete description of its
function in the running program.
The following section provides a general description of each MPX 500 Bank along with tables that
detail all of the programs available in that Bank. These details include the function of the Adjust
parameter and the Tap button (for programs that use tempo-controlled rate or delay times).
21
Program Descriptions
Lexicon
1 Plate
The Plate programs synthesize the sound of metal plates with high initial diffusion and a relatively
bright, colored sound. These programs are designed to be heard as part of the music, mellowing and
thickening the initial sound. They are a popular choice for enhancing pop music, particularly
percussion.
#
Plate PROGRAMs
Adjust
Tap
1
Small Plate
Livenes
–
2
Medium Plate
Livenes
–
3
Large Plate
Livenes
Predelay (1/32 Note)
4
Tap PreDelay
MidRT
Predelay (1/32 Note)
5
Tape Slap
ips (7.5/15)
–
6
Rich Plate
MidRT
Predelay (1/32 Note)
7
Large &Bright
MidRT
Predelay (1/32 Note)
8
VocalPlate
Livenes
Echo
9
Drum Plate
Livenes
–
Plate reverb was originally generated by a large, thin sheet of metal suspended upright under
tension on springs. Transducers attached to the plate transmitted a signal that made the plate
vibrate — making sounds broadcast through the plate seem to be occurring in a large open space.
22
MPX 500 User Guide
Program Descriptions
2 Gate
The Gate programs provide a fairly constant sound with no decay until the reverb is cut off abruptly.
These programs work well on percussion — particularly on snare and toms, but be sure to experiment
with other sound sources as well.
* Note that audio is muted briefly when Time is altered with Adjust.
#
Gate PROGRAMs
Adjust
Tap
10
StraightGate
Time*
–
11
Slope Down
Time*
–
12
Drum Gate
HighCut
–
13
140ms TapPre
HighCut
Predelay (1/32 Note)
14
240ms TapPre
HighCut
Predelay (1/32 Note)
15
340ms TapPre
HighCut
Predelay (1/32 Note)
16
440ms TapPre
HighCut
Predelay (1/32 Note)
17
540ms TapPre
HighCut
Predelay (1/32 Note)
18
Inverse
Time*
–
19
Dark Inverse
Time*
–
Gated reverbs were originally created by feeding a reverb, such as a metal plate, through an analog
gate device. The decay time was set to instant, and the hold time varied the duration of the sound.
23
Program Descriptions
Lexicon
3 Hall
The clean reverberation of the Hall programs is designed to add spaciousness, while leaving the
source material unchanged. In addition to general instrumental and vocal applications, the Hall
programs are a good choice for giving separately recorded tracks the sense of belonging to the same
performance.
#
Hall PROGRAMs
Adjust
Tap
20
Small Hall
MidRT
–
21
Medium Hall
MidRT
–
22
Large Hall
MidRT
–
23
Small Church
MidRT
–
24
Large Church
MidRT
–
25
Jazz Hall
MidRT
–
26
Dance Hall
MidRT
–
27
Synth Hall
MidRT
–
28
Concert Hall
MidRT
–
29
Gothic Hall
MidRT
–
Lexicon's Hall programs recreate the acoustics of actual places, from grand reverberant enclosures
to small concert halls.
24
MPX 500 User Guide
Program Descriptions
4 Chamber
The stereo Chamber programs produce even, relatively dimensionless reverberation, with little
change in color as the sound decays. The initial diffusion is similar to the Hall programs, but the sense
of space and size is much less obvious. This characteristic, along with the low color of the decay tail
makes these programs useful on a wide range of material. They are especially useful on spoken
voice, giving a noticeable increase in loudness with very low color.
#
Chamber PROGRAMs
Adjust
Tap
30
Brick Wall
HighCut
–
31
Basement
HighCut
–
32
Live Concert
Livenes
Eko Delay
33
Drum Chamber
MidRT
–
34
Moves on...
Livenes
–
35
Live Chamber
Livenes
–
36
VocalChambr1
Livenes
Eko Delay
37
VocalChambr2
Livenes
Eko Delay
38
Wide Chamber
Livenes
–
39
PCM60: Large
MidRT
–
Historically, recording studio chambers were often oddly shaped rooms with a loudspeaker and
set of microphones to pick up the ambience in various parts of the room.
25
Program Descriptions
Lexicon
5 Ambience
The Ambience programs simulates reflections from room surfaces with random reflections, a gradual
decay of overall level, and a gradual narrowing of the bandwidth.
In these programs, the Mix control adds depth — emulating the movement of a coincident pair of
microphones from the sound source into the room.
#
Ambience PROGRAMs
Adjust
Tap
40
Announcer
HighCut
–
41
VerySmallAmb
HighCut
–
42
SmallAmb
HighCut
–
43
MidSizeAmb
HighCut
–
44
Studio "D"
HighCut
–
45
Bright Amb
Decay
–
46
Dark Amb
Decay
–
47
Marble Foyer
Livenes
–
48
Smooth Amb
Decay
–
49
Guitar Amb
Decay
–
Ambience gives warmth, spaciousness and depth to a performance without coloring the direct
sound, and is commonly used to add a room sound to recorded music or speech. In music recording,
Ambience can realistically add distance to close-miked signal.
26
MPX 500 User Guide
Program Descriptions
6 Room
The Room programs are very useful on drums and percussion and can also be applied to electric
guitar tracks.
#
Room PROGRAMs
Adjust
Tap
50
Bedroom
Walls
–
51
Tiled Room
LF Boost
–
52
Studio "C"
MidRT
–
53
Small Room
Livenes
–
54
Studio "B"
MidRT
–
55
Rehursal Room
EQ
–
56
Studio "A"
MidRT
–
57
Large Room
EQ
–
58
Fat Space
MidRT
–
59
Chunky Space
EQ
–
The Room programs emulate actual rooms where there is a more apparent sense of being in a small
live place.
27
Program Descriptions
Lexicon
7 Tremolo
The tremolo programs offer a variety of tremolo shapes (square, sawtooth, triangle, sine and rectified
sine). The synchronization of the left and right sides can be adjusted to produce mono and stereo
effects. As the tremolo rates of several variations are set with Tap, it’s easy to match the tempo of the
music. Other variations let you set left and right channel waveforms out-of-phase, resulting in a
panning motion.
All of these programs should be used with Mix set to fully Wet. By adding more dry to the wet/dry mix,
Mix effectively sets the depth of the Tremolo. As Tremolo is essentially a rhythmic effect, care should
also be taken to make the rate work with the tempo of the music.
#
Tremolo PROGRAMs
Adjust
Tap
60
RectSineTap
Phase
Rate (1/8 Note)
61
Square Tap
Phase
Rate (1/8 Note)
62
Sine Tap Trpl
Phase
Rate (1/8 Note)
63
Triangle
Phase
Rate (1/8 Note)
64
Sawtooth
Phase
Rate (1/8 Note)
Tremolo is a rhythmic change in loudness, commonly employed as an expressive technique by
vocalists and wind instrument players. It is also one of the oldest electronic effects — frequently
used with electric guitar, electric piano and, sometimes, vocals. Different tremolo effects are largely
determined by the rate and waveform shape of the loudness change (fast or slow, smooth or sharp).
If the effect is used in a stereo mix, the left and right can be synchronized in a variety of ways to
produce dramatic side-to-side motion.
28
MPX 500 User Guide
Program Descriptions
8 Rotary
The rotary effect is a detailed simulation of a Leslie-style cabinet. The input signal is split into high and
low frequency bands. The rotation effect is created by a synchronized combination of pitch shifting,
tremolo and panning. Like the physical model, the high (horn) and low (drum) frequencies are “spun”
in opposite directions. Horn and drum speeds are independent, and are designed with acceleration
and deceleration characteristics to simulate the inertia of the original mechanical elements.
A virtual requirement for any organ sound, the rotary programs also sound great with guitar and
electric piano rhythm parts. In fact,they're great alternatives to chorus and tremolo effects for any
sound source.
All of these programs should be used with Mix set to fully Wet for the full effect.
#
Rotary PROGRAMs
Adjust
Tap
65
Rot:SlowFast
Switch
–
66
Rot Slow
Resnce
–
67
Rot SpeedAdj
Speed
–
68
Rot TapRate1
Balance
Rate
69
Rot TapRate2
Resnce
Rate
Rotary speaker cabinets were originally designed to provide a majestic vibrato/choir effect for
electronic theater and church organs. The most well known rotary speaker is the Leslie™ Model 122,
which has two counter-rotating elements — a high frequency horn and a low frequency rotor with
slow and fast speeds. The sound generated as the spinning elements change speed is truly magical.
The swirling, spacious effect is hard to describe, but is instantly reconizable.
29
Program Descriptions
Lexicon
9 Chorus
The stereo Chorus programs uses six independently randomized delay voices panned across the
stereo field. These programs, inherited from Lexicon's PCM 80, generate a rich, airy effect that can
simulate the sound of multiple sound sources from a single source. These programs are stunning on
acoustic or clean electric guitar.
All of these programs should be used with Mix set to fully Wet to achieve the full richness of the 6voice chorus.
#
Chorus PROGRAMs
Adjust
Tap
70
Chorus1
Resnce
–
71
Chorus2
HighCut
–
72
Chorus3
Diffusn
–
73
Slap Chorus1
Diffusn
–
74
Slap Chorus2
Depth
–
Chorus effects multiply the original audio source to create a lush, full sound. Traditionally used to
fatten up tracks and to add body to guitar without coloring the original tone, chorus effects are also
often used in combination with echoes, plates and other reverb effects.
30
MPX 500 User Guide
Program Descriptions
10 Flange
The MPX 500 stereo Flanger has two 2-tap delays —one per channel. The first tap is fixed, and the
second sweeps past it. Mixing the two delay taps together creates the flanging effect.
All of these programs should be used with Mix set to fully Wet to achieve the full flange effect.
#
Flange PROGRAMs
Adjust
Tap
75
Flng Lite
Speed
—
76
Flng Lite180
Resnce
—
77
Flng Med180
Speed
—
78
Flng Deep
Resnce
—
79
Flng Deep180
Resnce
—
Flanging effects were originally created by simultaneously recording and playing back two identical
programs on two tape recorders, then using hand pressure against the flange of the tape reels to
slow down first one machine, then the other. The result was a series of changing phase cancellations and reinforcements, with a characteristic swishing, tunnelling and fading sound.
31
Program Descriptions
Lexicon
11 Detune
The 4-voice stereo Detune programs have one pair of voices per channel. As more detune amount
is applied (with Adjust), the pair grow more out of tune, providing a lush sound without the need for
a dry signal to be mixed in.
All of these programs should be used with Mix set to fully Wet to achieve the full effect.
#
Detune PROGRAMs
80
Detune Mild
81
82
Adjust
Tap
Dtuning
–
Detune Med&Warm
Dtuning
–
Detune Heavy
Dtuning
–
83
Det Xtreme
Dtuning
–
84
Pitch Detune
Dtuning
–
Detune effects add a delayed/pitch shifted version of the original source — thickening up the sound. They
can be particularly effective when used to simulate double-tracking. They are also great alternatives to
chorus effects, adding the richness of a chorus without the audible sweep caused by the chorus rate.
32
MPX 500 User Guide
Program Descriptions
12 Pitch
The stereo polyphonic Pitch programs allow complete program material or monophonic sources to
be shifted from two octaves down through one octave up.
For pitch correction, use these programs with Mix set to fully Wet. For harmonization, use the desired
amount of wet/dry Mix.
#
Pitch PROGRAMs
Adjust
Tap
85
Pch Chrmatic
Pitch
–
86
Pitch Fine
Pitch
–
87
Pch 4th-5ths
Pitch
–
88
Pch PowerInV
Pitch
–
89
Vocal Chorus
HighCut
–
Altering the pitch of a sound allows a variety of effects from subtle detuning to the creation of
harmonies and chords.
33
Program Descriptions
Lexicon
13 Delay, Echo
The Delay, Echo variations include mono (5.5 seconds), stereo (2.7 seconds) and 6-voice multitap
effects. Each of the programs can be used for digital delay or tape echo effects. When the Adjust
parameter (Page 1, Edit knob 1) is set to a value between 63 and 3, tape echo effects are produced.
(Each repeat is darker and softer.) When the Adjust parameter is set to a value between 64 and 127,
digital delay effects are produced. (Each repeat is the same timbre, but softer.)
In programs 90-97, Adjust also sets the amount of feedback — with an increasing number of repeats
as the parameter value is increased. Delay time is set with Tap. Each program is preset with a
different useful rhythm.
In Variations 98-104, the amount of feedback is preset and Adjust determines Delay time.
NOTE: In all of the Delay programs (including the Dual combinations), Delay times (e.g. L Dly 1, R
Dly 1 etc.) not controlled by Tempo, are scaled by the Master Delay parameter (MstrDly). In some
programs, Adjust controls MstrDly.
MstrDly values range from 0-100% and are set to 100% in most preset programs. If this control is reset
manually (or by Adjust) to less than 100%, individual delay times will scale accordingly. For example,
if MstrDly is set to 25%, delay times will be reduced to 1/4 of their normal value. Other knobs which
control those delay times become correspondingly less sensitive — requiring, in this example, 4 times
as manny clicks to obtain their normal result.
When using any type of delay or echo effects with music, always pay attention to the way the repeats fall
rhythmically to the beat. The most effective delay and echo patterns are those that lock in with the tempo
of the tune.
34
MPX 500 User Guide
Program Descriptions
#
Delay, Echo PROGRAMs
Adjust
Tap
90
Dly Mono Tap
Feedbk
Delay Time
91
DlyStereo Tap
Feedbk
Delay Time
92
Dly ShuflTap
Feedbk
Delay Time
93
Dly Dot8 Tap
Feedbk
Delay Time
94
Dly 8+3plTap
Feedbk
Delay Time
95
Dly Pong Tap
Feedbk
Delay Time
96
Dly XfbkTap1
Feedbk
Delay Time
97
Dly XfbkTap2
Feedbk
Delay Time
98
Dly Mono
Time: 0-5.5sec
–
99
Dly Stereo
Time: 0-2.7sec
–
100
Dly TapeSlap
Time: 3 3/4 to 30ips
–
101
Multi Bounce
Time: 0-100ms
–
102
MultiInverse
Time: 0-400ms
–
103
Multi Linear
Time: 0-400ms
–
104
Multi Pong
Time: 0-150ms + Fbk
–
Delays and echoes are effects that repeat a sound a short time after it first occurs. The simplest
(and oldest) delay effect is tape slap — a single repeat about 100ms after the original sound. (It was
often used on Elvis’s voice and rockabilly guitar tracks.) Tape slap becomes tape echo when the
output of the tape is fed back into the input (feedback),turning a single repeat into a series of repeats
— each a little softer and a little darker than the last. This darkening of each repeat is characteristic
of the analog tape recording process. Digital delays don’t have this characteristic — each repeat
has the same exact timbre and the only difference from repeat to repeat is in loudness.
Digital delay and tape echo are both useful, but they are different. Tape echo is warmer and allows
the original sound to stand out more, while digital delay can present a “perfect” copy of the orignal
sound.
35
Program Descriptions
Lexicon
About the Dual Programs (Banks 14-24)
The Dual programs combine either a Delay or Reverb algorithm with a Flange, a Pitch or a Chorus.
The Effects Lvl/Bal parameter (Page 1 Edit knob 3) controls the relative balance of each effect in
the combination.
Four routing configurations are used in the Dual programs: Dual Stereo (Parallel), Cascade, Mono
Split and Dual Mono.
Bank 14 (Special FX) contains programs which use a variety of crouting configurations. The
remaining Banks (15-23) are organized as follows:
In Banks 15-21, the first six programs in each Bank are set up in the Parallel configuration - two
stereo programs placed side by side so that they receive and output stereo audio from both left and
right channels. The last four programs in each Bank are set up in the Cascade configuration - two
stereo programs, one placed after the other (for example, Flange-Delay, Flange passes its stereo
signal to the Delay).
Banks 22 and 23 are set up in the Mono Split configuration which is similar to Parallel, but here, one
program (Flange) receives audio from the left input and the other program (Delay) receives audio
from the right input. Both programs then output stereo audio.
Because Dual Mono programs are mixed differently, we've grouped them all in the last preset Bank
(24). In these programs, one program (Flange) appears on the left channel only and the other
program (Delay) appears on the right channel only.
36
MPX 500 User Guide
Program Descriptions
Generally, the Effects Lvl/Bal parameter (Page 1, Edit knob 3) controls the balance of the two effects
in each dual program. In the cascade variations, rather than simply controlling balance, the knob
varies the amount of the first effect or dry signal which is fed into the second effect.
This setting provides pitch
shift plus delayed pitch shift
At the leftmost setting,
you get only pitch shift
At center, you get
delayed pitch shift
This setting provides delayed
pitch plus delayed dry signal
At the rightmost setting, you
get only delayed dry signal
Behavior of Effects Lvl/Bal in the cascade programs. Several points from the knob's continuous range are
illustrated here, using Pitch-Delay as an example.
37
Program Descriptions
Lexicon
14 Special FX
The Special FX programs showcase the flexibility and creative possibilities of the MPX 500. Adjust
is completely different in each of the programs, so be sure to experiment with all of them.
#
38
Special FX PROGRAMs
Adjust
Tap
105
Infinite
HighCut
Eko
106
The Abyss
Dtuning
–
107
Jet Flange
Resnce
Speed (Whole Note)
108
Chorus>Verb
HighCut
–
109
TapRot Dly
Time: 0-150ms+Fbk
Rate (Drum/Horn)
110
Fader Verb
Level
Echo
111
LowRumble
Decay
–
112
Ducker Verb
Decay
–
113
DuckerChorus
Resnce
–
114
Ducker Xfeed
Feedbk
–
115
Echoes:Beats
Delay
Delay Time
116
Panning Dlys
Feedbk
Dly Time, Pan Rate
117
DreamSequence
Pitch
–
118
Infinite Dly
Feedbk
Delay Time (Whole Note)
119
Diffusor
Diffusn
–
MPX 500 User Guide
Program Descriptions
15 Flange – Delay
#
Flange-Delay PROGRAMs
Adjust
Tap
120
Flng Tap
Feedbk
Delay Time (1/4 Note)
121
Flng .8Tap
Feedbk
Dotted 1/8 Note
122
Flng 3plTap
Feedbk
1/8 Note Triplet
123
Flng PongTap
Feedbk
Delay Time (1/4 Note)
124
Flng Xfeed
Time: 0-150ms
—
125
Flng Bounce
Time: 0-200ms, Feedbk
—
126
Flng>Tap
Feedbk
Delay Time (1/4 Note)
127
Fngl>Fbk
Time: 0-150ms, Feedbk
—
128
Flng>Pong
Feedbk
Delay Time (1/4 Note)
129
Flng>Bnce
Time: 0-200ms, Feedbk
—
Routing
16 Pitch – Delay
#
Pitch-Delay PROGRAMs
Adjust
Tap
130
5th Tap
Pitch
Delay Time
131
8ve 3pTap
Pitch
Delay Time
132
8ve 8+3plTap
Pitch
Delay Time
133
3rd4thPong
Pitch
Delay Time
134
4th5th Xfeed
Pitch
Delay Time
135
5th6th Xfeed
Pitch
Delay Time
136
8ve> Xfeed
Pitch
Delay Time
137
5th>Xfeed
Pitch
Delay Time
138
MajMin>Fbk
Pitch
Delay Time
139
StepUp>Tap
Pitch
Delay Time
Routing
39
Program Descriptions
Lexicon
17 Chorus– Delay
#
Chorus-Delay PROGRAMs
Adjust
Tap
140
Chor Tap
Feedbk
Delay Time
141
Chor .8Tap
Feedbk
Delay Time
142
Chor 8+3pl
Feedbk
Delay Time
143
Chor Pong
Feedbk
Delay Time
144
Chor Repeat
Time
–
145
Chor Bounce
Time
–
146
Chor>Tap
Feedbk
Delay Time
147
Chor>Repeat
Time
—
148
Chor>Pong
Feedbk
Delay Time
149
Chor>Bnce
Time
–
Routing
18 Delay – Reverb
#
Delay-Reverb PROGRAMs
Adjust
Tap
150
Tap Small
MidRT
Delay Time
151
3plTapMidSz
MidRT
Delay Time
152
8+3pl Large
MidRT
Delay Time
153
Pong Small
MidRT
Delay Time
154
Xfeed MidSz
MidRT
Delay Time
155
Xfeed Large
MidRT
Delay Time
156
Tap > Room
Livenes
Delay Time
157
8+3pl> Large
MidRT
Delay Time
158
Xfeed > Room
Livenes
Delay Time
159
Xfeed> Large
MidRT
Delay Time
40
Routing
MPX 500 User Guide
Program Descriptions
19 Flange – Reverb
#
Flange-Reverb PROGRAMs
Adjust
Tap
160
LiteFl Smal
MidRT
Speed (Whole Note)
161
LiteFl MidSz
MidRT
Speed (Whole Note)
162
LiteFl Large
MidRT
–
163
DeepFl Small
MidRT
–
164
DeepFl MidSz
MidRT
–
165
DeepFl Large
MidRT
–
166
LiteFl > Small
MidRT
Speed (Whole Note)
167
LiteFl > Room
Livenes
Speed (Whole Note)
168
DeepFl>Large
MidRT
–
169
DeepFl>Room
Livenes
—
Routing
20 Pitch – Reverb
#
Pitch-Reverb PROGRAMs
Adjust
Tap
170
3rd4th Room
Pitch
PreDelay (1/32 Note)
171
4th5th Room
Pitch
PreDelay (1/32 Note)
172
5th6th Room
Pitch
PreDelay (1/32 Note)
173
8ve MidSiz
Pitch
PreDelay (1/32 Note)
174
Power MidSiz
Pitch
PreDelay (1/32 Note)
175
Detune Room
Dtuning
PreDelay (1/32 Note)
176
Fine> Small
Pitch
PreDelay (1/32 Note)
177
Power>Large
MidRT
PreDelay (1/32 Note)
178
4th > MidSiz
MidRT
PreDelay (1/32 Note)
179
8ve> MidSiz
MidRT
PreDelay (1/32 Note)
Routing
41
Program Descriptions
Lexicon
21 Chorus – Reverb
# Chorus-Reverb PROGRAMs
Adjust
Tap
180
Chor1 Small
MidRT
–
181
Chor1 MidSiz
MidRT
–
182
Chor1 Large
MidRT
–
183
Chor2 Small
MidRT
–
184
Chor2 MidSiz
MidRT
–
185
Chor2 Large
MidRT
–
186
Chor1 > Room
Livenes
–
187
Chor2 > Room
Livenes
–
188
Chor3 > Room
Livenes
–
189
Chor1 > Small
MidRT
–
42
Routing
MPX 500 User Guide
Program Descriptions
22 MonoSplitDly
#
MonoSplitDly PROGRAMs
Adjust
Tap
190
Flng+Tap
Feedbk
1/4 Note
191
Flng+Pong
Feedbk
1/4 Note
192
Flng+Xfeed
Time
–
193
Flng+Bnce
Time
–
194
DeepFl+Dly
Time
–
195
5th+Tap
Pitch
Delay Time
196
8ve+3plTap
Pitch
Delay Time
197
4th5th+Xfeed
Pitch
Delay Time
198
5th6th+Xfeed
Pitch
Delay Time
199
PchFine+Tap
Pitch
Delay Time
200
Chor+Tap
Feedbk
Delay Time
201
Chor+Pong
Feedbk
Delay Time
202
Chor+Xfeed
Time
–
203
Chor+Bnce
Time
–
204
Chor+Inverse
Time
–
Routing
43
Program Descriptions
Lexicon
23 MonoSplitRvb
#
MonoSplitRvb PROGRAMs
Adjust
Tap
205
Tap+MidSiz
MidRT
Delay Time
206
Pong+Large
MidRT
Delay Time
207
Bnce+MidSz
MidRT
Delay Time
208
Xfeed+Small
MidRT
Delay Time
209
Xfeed+MidSiz
MidRT
Delay Time
210
LiteFL+MidSz
MidRT
Speed
211
LiteFl+Large
MidRT
–
212
DeepFl+Small
MidRT
–
213
DeepFl+MidSz
MidRT
–
214
DeepFl+Room
Livenes
–
215
4th5th+Room
Pitch
PreDelay 1/32
216
5th6th+Room
Pitch
PreDelay 1/32
217
4ths+Large
MidRT
–
218
8ve+MidSz
MidRT
–
219
PchFin+MidSz
Pitch
–
220
Chor1+Small
MidRT
–
221
Chor1+Large
MidRT
–
222
Chor2+MidSiz
MidRT
–
223
Chor2+Large
MidRT
–
224
Chor3+MidSiz
MidRT
–
44
Routing
MPX 500 User Guide
Program Descriptions
24 Dual Mono
#
Dual Mono PROGRAMs
Adjust
Tap
225
Tap | Small
MidRT
Delay Time
226
Tap | MidSz
MidRT
Delay Time
227
Tap | Large
MidRT
Delay Time
228
Tap | Room
Livenes
Delay Time
229
DeepFl | Tap
Feedbk
Speed (1/4 Note)
230
DeepFl | Dot8
Feedbk
Speed (dotted 1/4 Note)
231
8ves | Tap
Pitch
Delay Time
232
8ves | 3pl
Pitch
Delay Time
233
Chor2 | Tap
Feedbk
Delay Time
234
Chor2 | Dot8
Feedbk
Delay Time
235
LiteFl | Large
MidRT
Speed
236
DeepFl | Large
MidRT
Speed
237
8ves | MidSz
MidRT
PreDelay 1/32
238
4ths | Large
MidRT
PreDelay 1/32
239
Chor1 | Room
Livenes
–
240
Chor2 | Room
Livenes
–
45
MPX 500 User Guide
MIDI Operation
MIDI Operation
MPX 500 MIDI Behavior
The MPX 500 “learns” Program Change and Continuous Controllers in its Learn Mode. All of the
parameters controlled by the front panel Edit knobs, as well as the Bypass and Tap buttons are
supported.
As all MPX 500 messages use a single, selectable MIDI Channel, before using any of the MIDI control
features, you should go to System Mode and select the MIDI Channel you want to use. (See System
Parameters.)
Any of the 16 parameters controlled
by the Edit knobs can be patched
to Continuous Controllers.
CCs and Program Change
messages can be patched to
Bypass and Tap.
Program Change messages can
also be used to load programs.
47
MIDI Operation
Lexicon
Using Program Change Messages for Program Load
The MPX 500 will allow loading of all of its preset and User programs via standard MIDI Program
Change messages. It also conforms to the use of MIDI controller 32 to perform Bank Select. The MPX
500 banks are ordered numerically from 0-24.
Here’s how it works. If a standard MIDI Program Change is sent to the MPX 500, Program Change
messages 0-9 will load programs the first ten programs from the current Bank.
If a Bank Select message (controller 32) precedes a Program Change message, any of the MPX 500
programs can be loaded.
For example, Program Change 1 with the Plate Bank selected, will cause the Small Plate program
to be loaded. Sending controller 32 with a value of 24 (or higher), followed by Program Change 1, loads
the first program of the User Bank. Sending controller 32 with a value of 1, then Program Change 2,
loads the second program (Slope Down) in the Gate Bank. Sending controller 32 with a value of 8,
then program change 4 will load the last program (Slap Chorus2) in the Chorus Bank
.
Once a bank is selected, all subsequent Program Change messages will select programs within that
bank until a new value for controller 32 is received, or until another PROGRAM or BANK selection
is made from the front panel.
This function can be disabled with the MIDI Program Change parameter in System Mode.
MPX 500 Program Banks
0
1
2
3
4
5
6
7
8
48
Plate
Gate
Hall
Chamber
Ambience
Rooms
Tremolo
Rotary
Chorus
9
10
11
12
13
14
15
16
17
Flange
Detune
Pitch
Delay/Echo
Special FX
Flange-Delay
Pitch-Delay
Chorus-Delay
Delay-Reverb
18
19
20
21
22
23
24
Flange-Reverb
Pitch-Reverb
Chorus-Reverb
MonoSplitDly
MonoSplitRvb
Dual Mono
User
MPX 500 User Guide
MIDI Operation
Learning Continuous Controllers
The MPX 500 recognizes Pitch Bend, AfterTouch and MIDI Continuous Controllers 1-31 and 33-119.
To Learn a Continuous Controller:
1. Simultaneously press Store and Tap/Cancel to enter Learn Mode. (The LEDs of both these
buttons will light to indicate Learn Mode is active.)
2. Move one of the MPX 500 front panel controls (Edit Knob 1-4 with any of the four edit pages
displayed, Bypass or Tap) to assign it to the controller. (Make sure that the Edit knob you want
assigned is displayed before you move its corresponding Edit knob. The selected knob's name
will appear highlighted and its current controller number and range will be displayed.)
3. Move the MIDI controller through its full range. To use only a fraction of the controller’s range, limit
your movement to the desired range. An indicator will appear on the display to indicate incoming
MIDI activity.
You can also dial up the controller you want with the Edit knob. In this case, the controller is
automatically set to full range (0-127).
4. Press Store to commit to the assignment.
5. To assign another parameter or front panel control to a MIDI controller, repeat steps 2 - 5.
NOTE: When a MIDI controller is assigned to
6. Simultaneously press Store and Tap/Cancel to exit.
Bypass or Tap, moving it through the mid-point
of its Learned range will execute a “press” of
the front panel button.
49
MIDI Operation
Lexicon
Activating Bypass or Tap functions with Program Change Messages
The MPX 500 recognizes MIDI Program Changes 100-127 (101-128 on some MIDI devices) on any
channel. To assign a Program Change message to Bypass or Tap:
1. Simultaneously press Store and Tap/Cancel to enter Learn Mode. (Both LEDs will light to
indicate Learn Mode is active.)
2. Press the front panel button you want to control (Bypass or Tap).
3. Send a MIDI Program Change to the MPX 500. The display MIDI indicator will come on to indicate
incoming MIDI activity.
4. Press Store to commit to the assignment.
5. Simultaneously press Store and Tap/Cancel to exit.
50
MPX 500 User Guide
MIDI Operation
To aid MIDI controllers (such as some foot controllers) which do not allow repeated Program
Change messages to be sent by a single button, the MPX 500 learns the next highest Program
Change along with every Program Change message it learns for Bypass and/or Tap. For
example, if you Learn Program Change 20 as the source for Bypass, Program Change 21 will
also control Bypass functions. To avoid conflicting Bypass and Tap assignments, leave a
space between the two buttons’ assignments. (i.e. if you learn Program Change 20 for Bypass,
remember that 21 will also be learned, so you will have to jump to Program Change 22 (and 23)
for Tap.
Clearing a Learned Assignment
1. Simultaneously press Store and Tap/Cancel to enter Learn Mode.
2. Turn the front panel control that you want to clear (Edit Knob 1-4 with the assigned parameter
displayed), Bypass or Tap) counterclockwise until None is displayed.
3. Press Store to execute.
3. Repeat Steps 2 and 3 to clear another front panel assignment.
5. Simultaneously press Store and Tap/Cancel to exit.
Learnable Front Panel controls and
Assignable MIDI Sources
MIDI
MIDI
Front Panel Controllers Pgm Change
Control
1-31, 33-119
100-127
Mix
Effects Lvl/Bal
Adjust
Bypass
Tap
Yes
Yes
Yes
Yes
Yes
No
No
No
Yes
Yes
51
MIDI Operation
Lexicon
MIDI Clock
The MPX 500 recognizes MIDI Clock messages and applies the tempo (40-400 BPM) to any program
which utilizes the Tap-tempo feature. Connect a MIDI device which outputs MIDI Clock (such as the
MPX R1 foot controller or a MIDI sequencer) to the MPX 500 MIDI IN jack, to have the MPX 500
automatically recognize and begin to process the MIDI clocks. When you change tempo on the
connected device, the MPX 500 will follow along and adjust its delay times or rates to match the tempo.
This can be disabled with the MIDI Clock parameter in System Mode.
MIDI Dumps
MIDI Dumps allow you to back up User programs, the currently running program, or your System Mode
settings and Learned patch assignments, to a storage device (typically, a sequencer).
MIDI Dumps are performed in System Mode. To perform a dump of the User programs, the current
program, or all of the System Mode parameter settings:
1. Press System. The LED will light to indicate you are in System Mode.
2. Turn Edit Knob 1 to select:
Dump User Programs
Dump Current Program
Dump System settings and Learned patch assignments
3. Press Store to execute the selected dump.
4. Press System again to exit System Mode.
NOTE: Dumps will not be executed unless the System parameter MIDI Out/Thru is set to Out (the
default setting.)
52
MPX 500 User Guide
MIDI Operation
MIDI Implementation
Lexicon MPX 500
Function
Basic
Channel
Mode
Note
Number
Velocity
After
Touch
Pitch Bender
Control
Change
Program
Change
System
Exclusive
System
Common
System
Real Time
Aux
Messages
Default
Channel
Default
Messages
Altered
Transmitted
Recognized
Remarks
X
X
Selected in System Mode
X
1
1-16
Mode 2
X
X
X
X
X
X
X
X (Off=9n v=0)
X
X
OX
X
X
OX
OX
X
0-15=1-16
X
True Voice
Note ON
Note OFF
Keys
Channels
True #
Bank Select
X
O
Lexicon
Real-Time
non Real-Time
:Song Pos
:Song Sel
:Tune
O
X
X
X
X
X
O
X
X
X
X
X
:Clock
:Commands
:Local ON/OFF
:All Notes OFF
:Active Sense
:Reset
X
X
X
X
O
X
X
X
X
X
Used as controller
Selected in System Mode
used as controller, Learned
1-119 (0 and 32 used as Bank Select)
Learned
100-127 ignored; Program message
0-99=Program Change 1-100 for
current Program Group as applicable
Product ID=20 (decimal)
Device ID=MIDI Channel
0-15 = 1-16
Notes:
Mode 1: OMNI ON, POLY
Mode 3: OMNI OFF, POLY
Mode 2: OMNI ON, MONO
Mode 4: OMNI OFF, MONO
O : Yes
X : No
OX: Selectable
53
MPX 500 User Guide
Specifications
Specifications
Audio Inputs
Digital Audio I/O
Power Requirements
Connectors: XLR/TRS balanced
Connectors: Coaxial RCA;
S/PDIF (IEC-958, CP-340)
90-250V 50-60Hz; 12.5W
3-pin IEC Connector
System Sample Rates
Dimensions
Internal Clock and S/PDIF Input:
44.1, 48kHz
19"Wx 1.75"H x 5.5"D
(483x45x140.25mm)
Display
Weight
150 x 32 LCD, Backlit
3 lbs (1.4kg)
Footswitch
Environment
Impedance: <600Ω
Tip/Ring/Sleeve phone jack for
Bypass and Tap (optional)
D/A: 24-Bit Delta Sigma;
20Hz-20kHz ±1dB
MIDI Interface
Operating Temperature: 32°-104°F
(0°-40°C)
Relative Humidity:
95% non-condensing
Crosstalk: -96dB @1kHz
Connectors: IN, OUT/THRU
Level: +20 to +8dBu full scale
Impedance: 50K bal.; 25K unbal.
A/D: 24-Bit Sigma Delta,
20Hz-20kHz ±1dB
Crosstalk: -96dB @1kHz
A/D Dynamic Range: 105dB, typical
Analog Audio Outputs
Connectors: XLR/TRS balanced
Level: +26dBu balanced;
+20dBu unbal.
D/A Dynamic Range: 101dB, typical
RFI/ESD
FCC class B; European EMC
Directive 89/336/ECC
Specifications subject to change without notice.
55
Lexicon, Inc.
3 Oak Park
Bedford MA 01730-1441 USA
Telephone: (781) 280-0300
Fax: (781) 280-0490
06/00 • Part No. 070-14116 • Rev 1
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