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Complete descriptions of the MPX 1 presets
Check here for solutions to common problems

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Thank you for your purchase of the MPX 1, the vanguard of Lexicons latest line of effects processors. The MPX 1 multi processor technology gives you multi effects the way you expect them to work with instant access to individual effects, and the ability to run uncompromised stereo reverb at all times. In addition to the superb sonic quality you expect from Lexicon, the MPX 1 gives you easy, top level control over even the most complex functions, and visual feedback to let you know exactly where you are and what features are available at all times. Six primary effect types: Pitch, Chorus, EQ, Modulation, Delay and Reverb give you push button access to an arsenal of 57 effects. 200 presets make maximum use of these effects in combination using as many as 4 stereo effects in addition to uncompromised stereo reverb. The preset library is organized under database control to allow you to quickly find programs designed for specific sources such as Guitar, Vocals or Live Performance, or to find all of the programs using certain effects such as Pitch or EQ. Be sure to experiment with all 200 presets to get a feel for the full range of MPX 1 capabilities. Visual feedback is available every step of the way when you're using the MPX 1, with lighted buttons indicating the state of the unit and alerting you to extra features available from the front panel. A large numeric display shows program (and patch) numbers. A second alphanumeric display shows you program and parameter names and settings. Like all Lexicon processors, the MPX 1 gives you as much depth of control as you're ever likely to want, while keeping the details out of your way. Surface control of the MPX 1 is straightforward and intuitive, with the most useful parameters of every program available right in Program mode. In addition to this specially designed "soft row", common functions and controls are brought right out to the front panel for instant access. For example, Mix and Level controls, for the entire system, or for any individual effect, can be accessed at any time by pressing the front panel Mix button. The front panel Patch button, which gives you similar instant access to the Patching system, lights whenever a patched parameter is selected to remind you that you can jump right in and out of the patching system at will. The MPX 1 gives you tap tempo control when you want it. You can assign tempo control to modulation rates, delay times or any effect parameter, ensuring that your effects are in tempo with your music. Tempos can be tapped in with the front panel Tap button (or an assigned controller) or dialed-in, in BPM (beats per minute) on the display. The MPX 1 also lets you generate MIDI clock from your tempo, as well as receive MIDI tempo from an external sequencer or drum machine. Many presets have delay times assigned to Tap tempo. Try loading some of these. (Select source type: Tempo in the database to find all of them.) When you load a tempo driven program, the front panel Tempo LED will flash at the current tempo to let you know the Tap button is active. Press Tap twice in rhythm to change tempo.

Press and hold the Program button to display the name and number of the currently running program while another program is displayed. If the displayed program is currently loaded, pressing and holding Program will display the effect routing assignment.
Manual Load To switch to manual program load, press System. Use the knob to select Modes, then use the < and > buttons to display:
Modes: Pgm Load <> Auto
Turn the knob to select Manual. In this mode, an asterisk (D) before the program name indicates that the displayed program is not loaded, and the flashing Program button LED indicates that the program is cued for loading when Program is pressed. (When the currently loaded program is selected, the Program button LED will light steadily, and there will be no asterisk in the display.)
In Manual Load, press the flashing Program button to load the displayed program. 2-2
The front panel Effect buttons light to show you which effect blocks are active. When you're scrolling through programs, they'll change to show you the effects in any displayed program. Once you stop scrolling, they'll return to display of the effects that are active in the currently loaded program. To bypass any active effect, press its button. The light will turn off and the effect will be bypassed. Press the button again to make the effect active again. Press and hold down any effect button to display the name of the effect and information about its status in the program (on or off).

Effect Bypass

The active effects of the currently loaded program are lighted. Press any lighted button to turn the effect off. Press it again to make the effect active again.
Mix and level controls in the MPX 1 are brought right out to the front panel for easy access. From any mode of operation, just press Mix to access these controls. The button LED will flash to let you know Mix is active. The display will show mix and level labels on the upper line, and the current settings on the lower line. One of the values on the lower line will be flashing to let you know which is selected for adjustment. Use the < and > buttons to select Mstr Mix, Mstr Level, or to step to the Mix and Level controls for any active effect in the currently running program. Use the knob to adjust the flashing parameter value.
Use > to step to the Mstr Level parameter, or to step forward to the next screen of Effect Mix and Level parameters.

Mstr >

Mix 100%

Level 0dB

From anywhere, press Mix to access mix and level parameters for the system, or for any active effect.
The knob will adjust the flashing parameter value.
When you've finished adjusting the mix and level controls, push Mix to return to the previous display.
MPX 1 tempo controls are available right on the front panel through the Tempo LED and the Tap button. Many preset programs are designed with their own tempo rate settings which are stored with the programs. The front panel Tempo LED will flash in tempo whenever you load a program with tempo control. This flashing indicates that the Tap button is active, allowing you to change tempo on the fly. Whenever you see the Tempo light flashing, simply press Tap twice in rhythm to establish the rate you want. You can override these individual tempo rates with a global tempo rate in the System Setup menu. Tempo is also available as an independent patch source which can control any effect parameter. (See Chapter 4: Patching and Chapter 5: System Controls.)

The MPX 1 Edit Menus

Press Edit to enter the main Edit menu, and use the knob to select the particular submenu you want (Compare, Meter Assign, etc.). Use the < and > buttons to enter the submenu and select parameters, and the knob to adjust parameter values. Press Edit again to return to the main Edit menu.
Whenever you edit an MPX 1 program, an edit indicator will appear in Program mode, in front of the program name on the display to let you know that the program has been changed since the last store operation.

Compare

EQ programs.Splitter
In Program mode an edit indicator appears before the program name if the program has been changed since the last store operation.
To hear the original version, press Edit to show the Edit select screen. Turn the knob to display Compare.
Edit select: > Compare
Press the > button. If the program has not been edited, the message Pgm is unchanged will be displayed. If the program has been edited, the display will change to show:

Compare: Edited Original

Use the < and > buttons to select and hear your edited version, or the original. To exit, press Edit to return to the main Edit menu. NOTE: If you exit with Original selected, you can view the original program parameters, but cannot edit them. To continue editing, exit with Edited selected.

Meter Assign

When shipped, the headroom display on the MPX 1 front panel is set to display Input Level. In the Meter Assign menu, you can change the assignment for the current program to have the display meters show any of the following:
Inputs Outputs Effect Input Level Effect Output Level Effect Input and Output Level LFO 1&2 Envelopes 1&2 Footpedal ADR 1&2 Simulation
The MPX 1 front panel meters default to showing Input Level, but they can be assigned to display other levels in Edit mode.
The selection that you make here will take effect immediately and will be stored with the program. Press Edit to exit to the main Edit menu.
Copy Effect lets you take an Effect from any program in the MPX 1 and copy it Copy Effect into the current program. To use this function, select Copy Effect from the Edit menu. Press the > button and use the knob to display any of the MPX 1 programs. The front panel Effect buttons light to show you which effect blocks are active in the displayed program. Press any lit button to display:

Tempo Rate can be set internally or via MIDI Clock. If Tempo Source is set to Internal, you can dial in any tempo from 41-400 BPM, or you can press the front panel Tap button twice in rhythm to establish the rate you want (allowing you to change tempo on the fly from any mode). You can also have the value of a patch source act as a tap trigger (See Chapter 4: Patching.) or choose to have your tempo transmitted as a MIDI Clock signal to control the tempo of connected MIDI devices. (See Chapter 5: System Controls or Chapter 6: MIDI Operation.) If Source is set to MIDI Clock, MPX 1 tempo will sync to incoming MIDI Clock. Whether tempo is set internally or via MIDI, the front panel Tempo LED will flash at the current rate whenever any delay or LFO rate is set for tempo control. MPX 1 programs can have their own tempo rate settings which are stored with the program. (Check out those tagged for DataBase sorting by "Tempo" for some examples.) You can override these individual tempo rates with a global tempo rate in the System Setup menu. Tempo is also available as an independent patch source which can control any program parameter. (See Chapter 4: Patching and Chapter 5: System Controls.)
This is the current tempo (in beats per minute). When Source is set to Internal, you can select any rate here from 41 to 400 BPM. The Tempo LED will flash at the new rate. Fractional tempos can be tapped in, but the display will always show the nearest whole number value.
You can choose to have tempo determined by the MPX 1 Tap and Rate controls (Internal), or by MIDI Clock (MIDI). Tap also acts as a reset, setting the downbeat of the LFOs.

Source

Tempo is expressed in BPM. This control allows you to specify the value of the beat (Eighth, DottedEighth, Quarter, DottedQuarter, Half, DottedHalf, Whole). If, for example, the rate is 120 BPM, and you select EighthNote here, the tempo will be 120 eighth-notes per minute. If you select QuarterNote here, the tempo will be 120 quarter-notes per minute. (The factory default is QuarterNote.) Option: Tap Average Press Options to access the Tap Average control which allows you to average the last 2-8 Taps. Higher numbers mean that the response to incoming Taps will be more gradual, as the tempo will be updated on each Tap with an averaged value.

Beat Value

Press Options to set a Tap Average for more gradual tempo changes when you press Tap.
Assign the Tap function to any of the MPX 1 Internal, MIDI or MIDI controllers(None, On, Knob, Puls1, Tri1, Sine1, Cos1, Puls2, Tri2, Sine2, Cos2, Rand, Arp, ADR1, ADR2, S/H, Env1, Env2, Mtr1, Mtr2, A/B, ATrg, BTrg, ABTrg, Pedal, Tog1, Tog2, Tog3, Sw1, Sw2, Sw3, CC1-31, CC32-119, Bend, Touch, Vel, Last Note, Low Note, High Note, Tempo, Cmnds, Gate, Trig, LGate, TSw). Option: Tap Source Level Press Options to access the Tap Source Level control which allows you to set the level (0-127) at which the Tap function is triggered.

Multiple Patches with the Same Destination

System Controls

The System menus shown below provide access to all of the controls which affect overall operation of the MPX 1, such as Bypass state, MIDI transmit and receive channels, as well as some unique options that make the MPX 1 adapt to your personal requirements. These controls are each explained in detail in this chapter, in the order in which they are displayed in System mode. Note that, in System mode, as elsewhere, the Value button acts as a toggle to allow you to assign "select" and "adjust" functions to either the knob or the < and > buttons, whichever is most convenient. As the default state of the Value button is On (lit), any step by step instructions given in this section will assume this state.

The System Menus

Press System to enter the System menu, and use the knob to select the particular menu you want. With the menu of your choice displayed (Audio, Modes, etc.), use the < and > buttons to enter the submenu and select parameters, and the knob to adjust parameter values. When you're finished making adjustments within any menu, press System to return to the main System menu, or press the < and > buttons to select another control from the same menu.
Audio Controls The Audio menu allows you to change the settings of controls which affect the
MPX 1 audio input and output characteristics. These include: configuring the inputs for stereo or mono applications, selecting analog or digital inputs and outputs, etc. The controls available are each described below.

Input/clck

The MPX 1 can use its own internal clock or it can reference an external clock. Depending on your rear panel connections, select Analog/Int, Analog/Ext or Dig/Ext. When Analog/Ext or Dig/Ext is first selected, the MPX 1 will repeatedly try to establish lock with an external digital source. If it is unable to establish lock, an error message will be displayed. Pressing any button will allow you to clear the error message and will return you to the Audio screen with Analog/Int selected. To select Analog/Ext you must connect a source of digital clock at the digital input. Note that the MPX 1 will accept only signals at 44.1kHz. During operation, loss of lock will trigger an error message if repeated resync attempts fail. LEDs on the front panel numeric display inform you when digital signals are being received, and when lock is established.
Front panel indication of the presence of incoming digital signals, and lock success is presented at the top of the numeric display.
Options: Error Log and Status Pressing Options gives you access to the following status and error log information:
Error Log: From anywhere in the Audio menu, press Options to display status and error log information. Press Options again to exit. Clck Status: Data: nnnn Invalid: nnnnn Internal Locked 4-digit parity error count 5-digit invalid data error count indicates Analog/Int selected as input Analog/Ext or Dig/Ext selected as input and valid clock is present

Pgm Load

Each MPX 1 program has its own Master Mix and Level parameters, as well as individual mix and level settings for each Effect. These settings are stored as integral parts of the program. The Mix parameter allows you to select Program, to have each program load with its own master mix setting, or Global which allows any program Master Mix setting to become the global setting for all subsequently loaded programs. Note that you can alter the global setting at any time by pressing Mix and changing the Mix setting on the Mstr Mix and Level screen. Once you have altered Mstr Mix, subsequent programs will load with the new value as the global setting.

Bypass

The Bypass parameter allows you to determine the behavior of the MPX 1 when the front panel Bypass button is pressed. When the Bypass button is pressed, it will light and a message will be briefly displayed to indicate that Bypass is on. Pressing Bypass again will briefly display the message that Bypass is off, and turn the button light off. The choices available from the Bypass Mode menu are: Bypass: Completely bypasses the MPX 1, passing unprocessed audio directly through to the outputs. (This is the default setting.) Mutes both the input and the output signal, giving complete silence. Mutes the input to the MPX 1, allowing the tail of the effect to ring out.

All Mute: Input Mute:

Press Options to select external controllers to perform the same functions as the front panel Bypass and the Effect Bypass buttons. Press Options again to exit.
Option: Bypass Source Assignments You can assign external controllers to activate Master Bypass and or Bypass for any of the six effect blocks: Pitch, Chorus, EQ, Mod, Delay or Reverb. Press Options to display the Bypass Source list. Use the < and > buttons to select the bypass function: Mstr, Pitch, etc. Use the knob to assign the control you want to have activate the selected function. The choice of controllers is: None (the default setting) Tog 1-3 Sw 1-3 CC 1-31 CC 33-119

Pgm Bypass

Pgm Bypass allows you to determine the behavior of the MPX 1 when a new program is loaded. The choices available are: All Mute or Bypass.
The MPX 1 gives you an exciting approach to working with delay times and modulation parameters. You can set these parameters in beats, allowing you to control your programs in a completely musical way. Each MPX 1 program has its own Tempo parameters, with tempo settings stored as an integral part of the program. These include Tempo Rate, Tempo Source (Internal or MIDI), Beat Value and Tap Source. The Global setting here allows you to override individual Tempo Rate settings with a global value which can then be changed on the fly. When shipped, the MPX 1 has the Tempo Mode set to Program, with each program driven by its own stored tempo rate. To change to a global tempo rate, select Global here. Whether Tempo Mode is set to Global or Program, you can set a new tempo rate by pressing the front panel Tap button twice. Alternatively, you can choose to have tempo set automatically from incoming MIDI clock. The rate you tap, or the MIDI tempo, will become the global setting. For more information about working with the tempo parameters, see Chapter 3: Editing.

The Store button LED will flash, indicating that the MPX 1 is armed to perform the copy procedure. Press Yes to execute the copy operation. Note that this will override the Memory Protect function if it is on. A displayed message indicates that the copy operation is complete. Press System to return to the main System menu.
Ten global patch assignments are available which allow you to assign an external controller to the MPX 1 Master Mix or Master Level controls, or to individually control any one of the MPX 1 Effect Mix or Level controls. Global patches override, but do not clear, program patches with the same parameter Destination. From the Global Patches screen, press > to display the following screen.
Select any patch source from the available source list shown here.

Global Patches

Global Src: None # 1 Dst: ----------Assign a Global Patch number (1-10).
Select the parameter you want to control with the displayed Global Src.
Use the < and > buttons to select one of the display fields shown above. Use the knob to assign a source, a destination parameter and a patch number. When you've completed your selections, press System to return to the main System menu.
Options: MIDI Learn and Dst Edit When Global Source is selected, pressing Options accesses a MIDI Learn function which automatically assigns any connected MIDI controller as the Source as soon as the controller is moved. Once you have moved the controller, press Options again to return to the Global Patches display. When Dst is selected, pressing Options accesses a set of controls which allow you to edit all assigned Destinations. Unchanged: Selections made in Options take effect immediately on returning to the Global Patches menu. This selection allows you to enter and exit Options without effecting any change. This control allows you clear all Destination assignments.
With Global Src selected, press Options to access MIDI Learn. With Dst selected, press Options to select Dst editing parameters.

Clear All: Mix Params:

This control allows you to assign Mix parameters to all Destinations. Level Params: This control allows you to assign Level parameters to all Destinations. Press Options again to return to the Global Patches display.

Call Waiting Vocal EQ

Mix Level Gain (1-4) Fc (1-4) Q (1-4) Mode (1-4)
0-100% Off, -89 to +6dB -72 to +24dB 20-20000Hz 0.1-10.0 LShlf, Band, HShlf
Dry/Wet ratio Amount of effect in the processed signal Boost/cut gain of filter(s) Center or corner frequency of filter(s) Q of filter(s) Determines EQ type(s)
1-Band (S), and 2-Band (S)
1-Band (S) has two bands of double-precision parametric EQ, one on each channel. 2-Band (S) has four bands of double-precision parametric EQ, two on each channel. The two channels share the filter controls. Center frequency, Q, boost/cut and filter type (low shelf, band, high shelf) are adjustable.
Digital EQ (S) Piano Hall
Mix Level Gain (1-2) Fc (1-2) Q (1-2) Mode (1-2)
1-Band (D) and 2-Band (D)
1-Band (D) has two bands of double-precision parametric EQ, one on each channel. 2-Band (D) has four bands of double-precision parametric EQ, two on each channel. Center frequency, Q, boost/cut and filter type (low shelf, band, high shelf) are adjustable.
Mix 0-100% Off, -89 to +6dB -72 to +24dB 20-20000Hz 0.1-10.0 LShlf, Band, HShlf -72 to +24dB 20-20000Hz 0.1-10.0 LShlf, Band, HShlf Dry/Wet ratio Amount of effect in the processed signal Boost/cut gain of left filter(s) Center or corner frequency of left filter(s) Q of left filter(s) Determines EQ type(s) Boost/cut gain of right filter(s) Center or corner frequency of right filter(s) Q of right filter(s) Determines EQ type(s)

Dual 2-Band

L=2BndR=Chmb
Level G-L, G-L1, G-L2 Fc-L, Fc-L1, Fc-L2 Q-L, Q-L1, Q-L2 M-L, M-L1, M-L2 G-R, G-R1, G-R2 Fc-R, Fc-R1, Fc-R2 Q-R, Q-R1, Q-R2 M-R, M-R1, M-R2
* = Interpolated; ( ) = Option of preceding parameter 7-14

SweepFilter

SweepFilter simulates a Moogtype resonant low-pass filter. Cutoff frequency and output level are interpolated, and can be swept. The performance of this filter is high enough that it can be used as a lowpass filter for hiss reduction. The parameters were designed to allow synthesizer-like control of the filter. For example: Use FC like the manual cutoff knob of an analog synth set it to the filter frequency desired when all modulation sources are at minimum. Use Mod as the patch destination for as many as five modulation sources (LFO, ADR, Env, LastNote, S/H. etc.). Use Scale as a master depth control for all modulation sources.

EkoSweepFltr SynthChmbr

Mix Level* Fc* FRes* Mod* Scale* Pan*
0-100% Off, -89 to +6dB 20-20000Hz 1-100 20-20000Hz -100 to +100% 50L to C to 50R

Dry/Wet ratio Amount of effect in the processed signal Corner frequency offset of filter Filter resonance: 7=a maximally flat filter added to corner frequency offset to produce corner frequency scales Mod Left/right pan control
Wah is a mono wah filter modelled after two classic wah-wah pedals. With Sweep selected, press Options to select Model C (CryBaby) or Model V (Vox). These models capture both the characteristic signature and nonlinear pedal response of the original pedals. The Bass control allows you to change the wah from a band-pass type effect to a lowpass type effect by progressively adding more low end into the effect. (Try it with bass and keyboards.) Resp controls how quickly the wah responds to changes of Sweep. (100 is very fast, 0 is very, very slow). To make a Mutron-like envelope filter, patch sweep to Env1 or Env2. Use Resp to control the effects responsiveness to changing dynamics. To make an Auto Wah effect, try patching Sweep to an LFO sine or triangle wave.
AutoWah Chrs Wah Pedal * = Interpolated; ( ) = Option of preceding parameter 7-15
Mix Level* Sweep* (Type) Bass Resp
0-100% Off, -89 to +6dB 0-100 C, V 0-100 0-100
Dry/Wet ratio Amount of effect in the processed signal Wah center frequency C=Crybaby, V=Vox Adds a low frequency boost to the wah Responsiveness to changes in Sweep

Fc Splitter

The Fc Splitter effect splits a mono input into a low-passed output on the left channel and a highpassed output on the right, with independent control of the corner frequencies of both filters. If the corner frequencies are the same, and the balance is set to 0, the frequency response will be flat when the two outputs are summed. Bal controls the relative level of left and right outputs. When Bal=0, the left and right outputs are not attenuated. Negative values attenuate the right output (highs). Positive values attenuate the left (lows).

OpenTheDoor

Mix Level* LoCut HiCut Bal*
0-100% Off, -89 to +6dB 100-10000Hz 100-10000Hz -50 to +50
Dry/Wet ratio Amount of effect in the processed signal Corner frequency for the low cut (highpass)band Corner frequency for the high cut (lowpass) band Relative level of the low and high band

Crossover

LFO1 and LFO2

LFO Modes Off: On: LFO is disabled (OnSrc and OnLvl are ignored) LFO is always on (OnSrc and OnLvl are ignored)
In the remaining modes, when the value of OnSrc rises above or falls below the value of OnLvl the LFO is switched on and off as follows: Latch: LFO toggles on and off whenever OnSrc value rises above OnLvl Gate: LFO stays on while OnSrc value is greater than OnLvl Once: LFO sweeps through one complete cycle when OnSrc value rises above OnLvl. (During the sweep, further changes of OnSrc value are ignored.) Reset: LFO is always on, but its phase resets to 0 whenever OnSrc value rises above OnLvl. RTrig: LFO completes one cycle when OnSrc value rises above OnLvl. (The phase of the LFO can be reset to 0 if OnSrc value rises above OnLvl during the sweep.) Filter Thing MPX Blue 8-1

Arpeggiator

Arpeggiator Modes and V Src Off: Up: Arpeggitator is disabled Notes play in ascending order
Down: Notes play in descending order Up-Dn: Notes play in ascending, then descending order Rand: Notes play in random order Frwrd: Notes play in the order they are held down Bkwrd: Notes play in reverse order Fd-Bd: Notes play forward, then backward The V Src parameter allows you to set the MIDI Velocity value for the arpeggiated notes. The range of this parameter is 0127. When set to 0, the arpeggiated notes will have the same velocity values that were played on the MIDI source. This allows you to control the dynamics of the notes in the arpeggio by how quickly you strike the keys. The arpeggiated notes will all have the same dynamics when V Src is set to values between 1 and 127 (1 is extremely soft, 127 is very loud). Try patching MIDI Mod wheel to V Src. Move the Mod Wheel to its minimum position and the arpeggiator will track your playing dynamics move it beyond minimum and it becomes a volume control for the arppeggios.
The MPX 1 arpeggiator requires a MIDI note source (keyboard, sequencer, etc.) to be connected to the MIDI IN connector. Once connected it will arpeggiate keys that are held down. You can use the arpeggiator as a source to control MPX 1 parameters (like SweepFilter fc , for example), but the real fun starts when you connect a MIDI sound source to the MPX 1 MIDI OUT connector. The arpeggiator will play the sound source. Parameters are provided to allow you to turn the arpeggiator on and off, connect a clock source to set the arpeggiation speed, set the order that the notes are played, and control their loudness.

64 DoubleEQ Rvb A bright, EQd and slightly predelayed small room reverb. 65 Rev Wahtouch A bright reverse reverb through a wah. The wah filter is controlled by input level. 66 Tap GatedRvb A tempo-contolled LFO is used as a rhythmic gate to a large plate. The gate is opened every other beat for the duration of an eighth-note. Use this program to add reverb to selected beats of a stereo source. Press Tap twice to sync up with the beat. 67 TapDly/Rvb Use this program as a simple Tap-driven delay with moderate feedback, or press A/B to add a clean plate on a separate path. Great for live sound where you can Tap in the delay and then bring reverb in and out with A/B. 68 Diffuse Dlys This program uses the delay Fbk Insert Option to place an ambience effect inside of the delay feedback loop. The result is echoes that grow more diffuse as they repeat. A subtle alternative to plain vanilla delays, this program will thicken up acoustic sources without detracting from them. 69 IPS Tape Slap Press A/B to select delays that simulate 7 1/2 or 15 ips tape slaps. 70 Frame Delay A stereo delay that allows audio to be offset by as many as 5 frames at 30 frames per second. Press Value to find the Frames control in the Soft Row. 71 DlyFlangePan A cool multi-effect combo. Mono echo, stereo flanger, auto panner and plate reverb. Press and hold Program to check out the routing of these effects. Press A/B to glide between fast and slow pan rates. Use Tap to change delay times. Press Value for the key controls for each individual effect. 72 ChaseEkoPan Auto panner and echo effects combined so that the echoes chase the dry signal through stereo space. A/B glides between slow and fast pan rates. Press Tap twice to set the echo rhythm. 73 Delay>Detune A detune block that is fed into a regenerating delay creates a big impression on small sounds. 74 Ducked Delay A delay effect that is controlled by input level. The delays are ducked out ot the way when the input is moderate to loud, but rise in level when input gets very soft or stops. A nice way to put some repeats on the end of phrases. 75 Spin + Dlys This multi-effect combination is a great alternative to chorus/delay or rotary/delay programs. Detuned echoes are sent through an auto panner and plate reverb. Press A/ B to glide between fast and slow pan rates. Press Tap to change the echo rhythms. 76 Ping Pong Echoes that bounce back and fourth between left and right sides of a stereo mix. 77 Swept Echoes On the upper path is an autopanned, envelop-driven wah. The lower path is a tapcontrolled dual delay. This is a great dynamic effect for vocals or instruments.

Programs 145-152 are designed for dual mono applications. The left and right channels each have independent mono effects. We had PA applications in mind when we created these, but youll find they come in handy whenever you want to get the most out of your consoles aux sends. 145 L=Dly R=Chmb Left channel echo. Right channel large room reverberation. 146 L=Dly R=Ambi Left channel echo. Right channel ambience. 147 L=Dly R=Dtun Left channel echo. Right channel detuner. 148 L=Ptch R=Chmb Left channel pitch shifter. Right channel large room reverberation. 149 L=Dly R=Ptch Left channel echo. Right channel pitch shifter. 150 L=2BndR=Chmb Left channel 2-band EQ. Right channel large room reverberation. 151 Dual 2-Band Independent 2-band EQs on the left and right channels each with independent gain, frequency and Q for both bands. 152 Dual TapDlys Independent tap delay on the left and right channels. Each with its own delay rhythm, feedback and damping controls. 153 Ghost Mist A phased ping pong delay into a long strange ambience reverb. Kind of creepy!
154 Submarine Who could have possibly fathomed an underwater sound as deep as this? 155 50s Sci Fi Inspired by the score of Forbidden Planet. This preset plays a cascade of descending pitches all by itself complete with echoes and reverberation! Press A/B to turn off the pitch generator and process the input of your choice. 156 Synthis izer A randomly swept filter with mono flange and reverse reverb. Great with sustained sounds. 157 S/H Improv In this program, every input note is shifted chromatically to a different note within a oneand-a-half octave range. The shift is triggered by input level a new note for each attack. The rhythm of your playing determines the overall shape of the melodies produced. Check it out with any percussive source. It works particularly well with muted guitar or bass. 158 MIDI Arp 1 This program is designed to work with a MIDI keyboard or sequencer. Connect the keyboard MIDI OUT to the MPX 1 MIDI IN and MPX 1 MIDI OUT to the MIDI IN of any MIDI sound source. When you play two or more notes at once on the keyboard, the MPX 1 will automatically arpeggiate them. Press Tap twice to set the arpeggiator speed. Run the audio of the MIDI source into the MPX 1 and youll hear phase shifting and delay synchronized to the arpeggiator. Audio is panned with the arpgegiator as well lower notes to the left and higher notes to the right. 159 MIDI 16thArp Similar to MIDI Arp 1, but with a 16th note rhythm and different effects. 160 A/B Freeze Press A/B to freeze the last two seconds of audio into an endless loop. The loop is played through an Aerosol flanger. Press A/B again to kill the loop. 161 VolumePedal This program is designed to work with a volume pedal connected to the MPX 1 pedal input. The input is routed through a pedal-controlled volume effect in the Mod block. From there, it travels through a crossover, dual detuners, stereo delay and ambience all in series. Pump the pedal to create ethereal crescendos of sound. If you dont have a pedal connected, and you want to listen to the effects in this program, press Mod to bypass the volume effect. 162 Open the Door This program was made for dialog and sound effect work. It puts your sound inside a small ambient room. Press A/B to open and close the door. 163 No Traction Have you ever felt stuck in life. A large hall with panned pitch shifting that rises and speeds up with strength of input signal. 164 Call Waiting Need to simulate call waiting for dialog sound effect? This will do it. The basic effect is a telephone filter, but you can press A/B to interupt the dialog and inject a call-waiting beep.

The MPX 1 doesn't respond to SysEx commands. Check the SysEx setting (and the Receive Device ID selection) in the System mode MIDI menu.
The MPX 1 does not transmit SysEx Automation commands. Check the Automation setting (and the Xmit Device ID selection) in the System mode MIDI menu.

Operational Problems

The MPX 1 will not lock onto an incoming digital signal. Check the cables that you are using. DO NOT USE ANALOG AUDIO CABLE TO CONNECT DIGITAL AUDIO. Check to make sure that your input signal complies with S/PDIF format standards. The MPX 1 will only lock onto valid 44.1kHz signals.
The front panel knob and the < and > buttons are not performing the expected function. In Edit and System modes, the Value button acts as a toggle to determine whether the knob or the < and > buttons perform the functions of selecting displayed items, or adjusting their values.
No Effects Output Check the setting of Mix Mode in the System mode Setup menu, the setting of Mstr Mix and Lvl at the Mix button and the Effect Mute at the Bypass button. Also verify that any controllers patched to Input Level, or Mix are not turned off.

Power On Behavior

The MPX 1 performs a series of self tests each time it is powered on, then displays the MPX 1 copyright notice. This should be followed by the display and loading of the last loaded effect. If this sequence does not occur, contact Lexicon Customer Service.

Specifications

MPX 1 Specifications
Audio Input Connectors: Impedance: Levels: CMRR: 1/4 inch T/R/S phone jacks (2), XLR 3-wire balanced (2) +4dB/BAL switch position: 100k -10dB/UNBAL switch position: 50k +4dB/BAL switch position: -2dBu min for full scale, +20dBu max -10dB/UNBAL switch position: -14dBu min for full scale, +8dBu max +4dB/BAL switch position: 40dB minimum, 10Hz to 20kHz

Audio Output

Connectors: Impedance: Levels:
1/4 inch T/R/S phone jacks (2); XLR 3-wire balanced (2) 600, unbalanced +18 dBu max, full scale

A/D Performance

Frequency Response: Crosstalk: S/N Ratio: THD: Dynamic Range: Delay: