Electro-Harmonix Mod Rex Polyrhythmic Modulator User Manual

User manual for the Electro-Harmonix Mod Rex, a polyrhythmic modulation unit with 4 sections, 9 tempo subdivisions, 100 presets, and full MIDI control.


Electro-Harmonix Mod Rex Polyrhythmic Modulator User Manual - cover page
Brand
Electro-Harmonix
Document type
User Manual
Language
English
Pages
20
File format
PDF
File size
519 KB
Published
31 October, 2026
Updated
31 October, 2026
MD5 checksum
17C6037029696A59308EDB27036744C0

About this manual

The Mod Rex is a powerful modulation unit designed for multiple instruments and uses, offering effects like vibrato, flanger, chorus, phaser, tremolo, modulated panning, and modulated filter. It supports up to 4 simultaneous modulation sections, each with 9 tempo subdivision options and 4 LFO shape options. The unit features 100 storable presets, full stereo I/O, tap tempo, external clock sync, and full MIDI control. It also includes external expression pedal and foot controller inputs, and a 9.6VDC/200mA power supply. The manual covers control layout, display modes, parameter settings, presets, and MIDI integration.

What's inside

  • Overview: What Is The Mod Rex?
  • Control Diagram
  • Top Panel Display Screen
  • Divisions Display Mode
  • Tempo Display Mode
  • Presets Display Mode
  • Modulation Parameters
  • Divisions
  • Tempo and Rate Knob Mode
  • LFO Shapes

Specifications

Modulation SectionsUp to 4 simultaneous sections
EffectsVibrato, Flanger, Chorus, Phaser, Tremolo, Modulated Panning, Modulated Filter
Tempo Subdivision Options9 options per section
LFO Shape Options4 options per section
Presets100 storable presets
Power Supply9.6VDC/200mA, center negative
Tempo Range10 to 500 BPM

Frequently asked questions

What are the modulation sections on the Mod Rex?

The Mod Rex has four modulation sections: MOD (Vibrato, Flanger, Chorus, Phaser), TREM (Tremolo), PAN (Modulated Panning), and FILTER (Modulated, Low-Pass, High-Pass, Band-Pass Filter).

How many tempo subdivision options are available?

Each modulation section has 9 tempo subdivision options, including whole note, half note, quarter note, eighth note, and sixteenth note.

Can the Mod Rex be controlled via MIDI?

Yes, the Mod Rex supports full MIDI control, including MIDI tempo sync, program changes, and control change messages.

What is the power requirement for the Mod Rex?

The Mod Rex requires a 9.6VDC/200mA power supply with a center negative plug and does not accept batteries.

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