Lexicon MPX - ADDENDUM REV 1 User manual

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Highlights
•World-class Lexicon reverb: Plate, Gate, Hall, Chamber, and
Ambience
•2 DSP engines including Lexicon’s proprietary LexiChip®
•24-bit A/D and D/A
•200 presets; 50 user programs
•Up to six simultaneous effects
•Multiple delay, modulation, and pitch effects
•Multi-effects combine Delay with Reverb, or either with;
Flange, Pitch, Chorus, Rotary,
Parametric EQ, Sweep Filter,
and Tremolo
•Large graphic display
•S/PDIF input and output
•Balanced analog inputs and outputs (XLR and 1/4”)
•Independent processing on each input
•Tap Tempo for instant setting of delay and modulation times
(may be set using footswitch)
•Full MIDI control
•Internal power supply
•Optional MPX R1 remote controller
The MPX 1 employs two separate DSP processors: our proprietary
LexiChip® to deliver world-class stereo Reverb and Ambience
algorithms and a separate DSP chip to create additional effects. The
result is uncompromised Lexicon stereo reverb and ambience
effects that are available all the time, whether running alone or in
conjunction with Chorus, Delay, EQ, Modulation, or Pitch effects.
Many “multi-effect” processors don’t meet this basic requirement.
The MPX 1 not only meets this standard expectation, but has
enough processing power remaining to run even more effects.
Instant Access
Six effect types in the MPX 1 are always accessible via dedicated,
back-lit buttons on the front panel. Each effect "block" is
independent, with its own Bypass, Level, and Mix controls. The audio
path through each effect is in stereo. Selecting new effects for
programs is simple, with an arsenal of effects for each block
(56 total) just a button push away.
Quick and Easy Program Fine-Tuning
The MPX 1 comes loaded with 200 carefully crafted presets that
reflect its versatility. Fine-tuning presets to match music or
soundtracks is quick and simple thanks to pushbutton access to a
Soft Row that holds the most useful parameter combinations for
each program. Creating or restructuring programs is also easily
accomplished with an Edit Mode that provides an extensive pool of
effect parameters.
On-Board Help
The MPX 1 offers a built-in help feature to provide guidance through
all front panel controls. Pressing and holding any button will display
a message that explains its function without executing its action.

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www.lexicon.com/mpx1
This allows exploration of most functions without ever opening the user
guide. In addition to press-and-hold help, the MPX 1 has an optional sleep
mode help that automatically displays useful messages when the system is idle.
Easy Operation
The front panel of the MPX 1 includes dedicated indicators and displays that
provide instant feedback of in-use and available features. Effect select buttons
light to show currently active effects. A Tempo LED flashes to indicate the
current tempo in programs that utilize tempo-controlled delay times or
modulation rates. A Tap button allows tempo changes on the fly. The A/B LED
lights to signal times when the user can take advantage of the A/B button to
morph between effect or parameter variations. A numeric display makes
program and patch numbers highly visible. An alphanumeric display shows
parameter names and values, preset numbers, and algorithm routings.
Dedicated Mix and Patch buttons provide instant access to mix and level
settings of single or multiple effects, as well as the MPX 1 patch system. The
Patch button lights whenever a patched parameter is displayed. Bypass toggles
the master bypass. The Options button lights to indicate that additional
functions and features are available.
Effects
The MPX 1 has 56 Chorus, Delay, EQ, Modulation, Pitch, and Reverb
effects. Each embodies the audio quality and control flexibility needed in a
dedicated processor. Effects include: high-precision (32-bit) parametric EQ;
rotary speaker cabinet simulator; high-quality 2-voice pitch shifter; delays and
Echoes (Dual, Mono, and Stereo); Looper and Ducker; multi-voice stereo
Autopanner, Chorus, Flangers, Phaser,Wah, and more.
Reverb
Lexicon’s renowned reverb algorithms are the foundation of the MPX 1:
Ambience, Chamber, Hall, Gate, and Plate. All are true stereo with
independent processing of left and right inputs. Thanks to its LexiChip®
processor, loading a reverb into a program on the MPX 1 can be done
regardless of which other effects are running.
Effect Ordering and Routing
Effect ordering and routing within each program is flexible with the MPX 1.
Each of the six effect blocks is independent in each program. Effects can be
arranged in any order by “dragging and dropping” them on a visual map.
Similarly, a routing map allows distribution of the six effect blocks across two
parallel stereo paths, which can be split and merged at multiple points. The
routing map is rewired by changing graphic "patch cord" connections.
Program Library
The MPX 1 offers an extensive program library that is crafted to provide
sounds suitable for performance, production, and sound design applications.
These programs exploit the unique characteristics of each effect, and furnish
useful examples of effect combinations that can be created with the MPX 1.
A built-in database function makes it simple to locate a desired program. This
database is user-definable, allowing reorganization as needed.
Options Button
The MPX 1 is designed to provide as much control as possible, while keeping
unused options ready until needed.An Options button lights to indicate that
additional features are available with the current display. Press the Options
button to access these features: Delay parameters allow delay times to be
displayed in feet, meters, milliseconds, or echoes-per-beat. Rate parameters
can be displayed in Hertz(Hz) or cycles per beat. Feedback parameters include
an option that allows effect blocks to be inserted in delay or echo feedback
loops. Patch options automatically "learn" MIDI control sources.
Patching System
The ability to control dynamic effect parameters is essential to create great
sounding programs. The MPX 1 patch system provides over 150 controllers
that can be assigned to any effect parameter including: LFO(2), ADR(2),
Envelope Follower(2),Arpeggiator, Random Generator, A/B Glide, Tempo, and
a Sample and Hold Generator. In addition to five patches per program, there
are ten global patches available at all times.
MIDI Implementation
The MPX 1 offers extensive global MIDI control for individual and master
Bypass, Mix, and Level controls as well as A/B, Tap, and all effect parameters.
Tempo parameters synchronize to incoming MIDI clock, or the MPX 1 can
transmit its own MIDI clock based on Tap tempo. Internal control sources
such as audio levels, LFOs, ADRs, S/H, and pedal can be sent as Continuous
Controller messages.A built in arpeggiator “plays” MIDI sound generators and
produces synchronized audio effects.

Analog Audio Input: XLR and 1/4” balanced (T/R/S)
Input Level: -2dBu to +20dBu, balanced;
-14dBu to +8dBu, unbalanced
Input Impedance: 100kΩ, balanced; 50kΩ, unbalanced
Analog Audio Output: XLR and 1/4” balanced (T/R/S)
Output Level: +18dBu
Output Impedance: 600Ωunbalanced
Digital Audio Input: Coaxial RCA
Format: 24-bit S/PDIF
Sample Rate: 44.1kHz
Digital Audio Output: Coaxial RCA
Format: 24-bit S/PDIF
Sample Rate: 44.1kHz
Conversion: 24-bit A/D; 24-bit D/A
Internal Audio DSP: 20-bit; 32-bit
Frequency Response: 20Hz - 20kHz ±1dB
Crosstalk: -60dB
THD: 0.01%, 20Hz - 20kHz
Dynamic Range: D/A: >95dB typical,
20Hz - 20kHz, unweighted
A/D: >90dB typical,
20Hz - 20kHz, unweighted
A/A: >95dB typical,
20Hz - 20kHz, unweighted
MIDI Interface: 7-pin DIN connector for MIDI IN
and powered bidirectional remote;
5-pin DIN connectors for
MIDI THRU and OUT
Footswitch: 1/4" T/R/S connector for bypass and tap
Footpedal: 1/4" T/R/S connector
(10kΩ- 100kΩimpedance)
Power Requirements: 100 - 240 volts AC, 50 - 60Hz, 25 watts
(3-pin IEC connector)
Remote Power In: 2.5 mm 9 volts AC (not included)
Dimensions: 19" W x 1.75" H (1U) x 9" D
(483 x 45 x 289 mm), rack mount standard
Weight: 6.125 lbs. (2.8 kg)
Operating Temperature: 32° to 104°F (0° to 40°C)
Maximum Humidity: 95% without condensation
MPX 1