Lexicon MPX 550 - Manual (Page 18)

Getting Started
Lexicon
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ABOUT THE MPX 550
Thank you for purchasing the MPX 550 Dual Channel
Processor, featuring Lexicon’s proprietary Lexichip®.
The MPX 550 is a true stereo, dual-channel processor
with 24-bit internal processing, analog-to-digital
conversion, and digital-to-analog conversion. It offers
255 presets with classic Lexicon reverb, including
Tremolo, Rotary, Chorus, Flange, Pitch, Detune, 5.5
second Delay, Echo, and Compression. Dual-channel
processing creates two independent effects in
Dual Stereo (Parallel), Cascade, Mono Split, and Dual
Mono combinations.
A large, graphic front panel display provides at-a-glance
viewing of program and system status. Programs are
organized into 28 banks, with 27 for presets and 1 for
user programs. The PROGRAM knob scrolls through all
stored programs, or between banks for faster selection.
Each program includes up to 20 adjustable parameters,
which are organized into “Edit Pages" that consist of four
parameters each. The Edit Pages button cycles through
available Edit Pages for the selected program.
The editing process is further simplified with dedicated
EDIT knobs that correspond to displayed parameters, as
well as a special "Adjust" parameter for each program
that facilitates quick changes to the most critical aspect
of the sound. In many cases, this custom parameter
controls several program parameters at once. For
instance, it controls the liveness of space in many
Chamber and Room programs by changing Decay, Early
Reflections, and EQ simultaneously.
Tap Tempo simplifies the once-complicated process of
matching the delay times and modulation rates of
tempo-based programs to the music. Tempo-controlled
delays and modulation rates lock to tempo. In addition,
Tap Tempo can be controlled using the front panel
Tap/Cancel button, audio input, a dual footswitch, or an
external MIDI controller that utilizes MIDI Continuous
Controller or Program Change messages.
The MPX 550 features Learn Mode, a powerful editing
tool that allows MIDI patching of all parameters, as well
as the Bypass and Tap/Cancel buttons. Standard
Continuous Controller and Program Change messages
provide complete control of these functions.