Electro-Harmonix MOD REX Manual page 3

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Overview: What Is The Mod Rex?
The Mod Rex is a powerful modulation unit that gives you a massive toolbox of
modulation options. At the core of the Mod Rex are its four modulation sections:
MOD: A choice of a vibrato, flanger, chorus, or phaser effect
TREM: A tremolo effect
PAN: A modulated panning effect
FILTER: A choice of a modulated, low-pass, high-pass, or band-pass filter effect
Any of these sections can be on individually, and any combination of them can be on
simultaneously. All four are linked to the same tempo in beats per minute (BPM), but
each one can independently have one of nine tempo subdivision options. Each
modulation section has multiple parameters to fine tune your sound, including four
modulation LFO shape options: rising-sawtooth, triangle, falling-sawtooth, and square.
You can have a vibrato effect going at exactly twice the rate as a simultaneous tremolo
effect. Have a phaser on the whole note while simultaneously having a tremolo on the
quarter note and a modulated low-pass filter on the eighth note. Create a poly-
rhythmic effect with a quarter note tremolo and a dotted-quarter note modulated filter.
These are merely a handful of examples of the nearly limitless possibilities with the Mod
Rex.
In addition to these rhythmic-combination effects, you can also use the Mod Rex as a
more traditional modulation effect, just with several non-traditional options. Apply
falling-sawtooth flanger blasts, or use a tap-tempo stereo phaser. MIDI sync external
tracks and apply a rising-sawtooth tremolo for a side-chaining effect.
The bottom left LED always blinks based on the quarter note. The tempo can be set
manually with the tempo knob, via tap-tempo, or synced to an external device via MIDI
clock or an external pulse clock.
The Mod Rex is designed to maximize your ability to precisely apply rhythmic effects to
whatever you plug into it. Its tap-tempo allows you to continue to play while tapping, as
all modulations (including any with uneven subdivisions) adjust fluidly to your tapped
tempo without resetting upon each tap. Plug a drum machine, sequencer, or an audio
interface from a laptop into the Mod Rex and sync the tempo with MIDI Clock to create
perfectly-in-sync rhythmic effects.
The Mod Rex can store and recall 100 presets to maximize your ability to create and use
a variety of effects. It features full stereo in and out. An external expression pedal or
foot controller can be used to control the Mod Rex. The unit is fully MIDI controllable
and integrates seamlessly into any modern MIDI setup. These options make the Mod
Rex the ultimate rhythmic modulation machine.