Electro-Harmonix MOD REX Manual
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Electro-Harmonix MOD REX Manual

Polyrhythmic modulator
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Congratulations on your purchase of the Electro-Harmonix Mod Rex Polyrhythmic
Modulator. The Mod Rex is a powerful modulation tool designed for multiple
instruments and uses, and is equipped with many features, including:
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Up to 4 simultaneous modulation sections synced together in time
•
MOD section offers choice of Vibrato, Flanger, Chorus, or Phaser effect
•
Standalone Tremolo, Modulated Panning, and Modulated Filter sections
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9 tempo subdivision options for each modulation section
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4 LFO shape options for each modulation section
•
100 storable presets
•
Full stereo input and output
•
Tap Tempo
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Tempo-Sync to an external device with MIDI Clock or an external pulse clock
•
Full MIDI control of all parameters and recalling of presets
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External expression pedal input
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External foot controller input to bank up and down presets
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9.6VDC/200mA power supply included
WARNING: Your Mod Rex comes equipped with an Electro-Harmonix 9.6VDC-200mA
power supply. The Mod Rex requires 100mA at 9VDC with a center negative plug and
does not accept batteries. Using the wrong adapter may damage your unit and void the
warranty. Please do not exceed 10.5VDC on the power plug.
MOD REX
Polyrhythmic Modulator
1

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Summary of Contents for Electro-Harmonix MOD REX

  • Page 1 WARNING: Your Mod Rex comes equipped with an Electro-Harmonix 9.6VDC-200mA power supply. The Mod Rex requires 100mA at 9VDC with a center negative plug and does not accept batteries. Using the wrong adapter may damage your unit and void the...

  • Page 2: Table Of Contents

    Overview: What Is The Mod Rex? – page 3 Control Diagram – page 4 Top Panel Display Screen – page 5 Divisions Display Mode – page 5 Tempo Display Mode – page 6 Presets Display Mode – page 6 Modulation Parameters –...
  • Page 3 (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.
  • Page 4 1-VOL, controls master volume of the effect (page 9) 2-Digit Display and Display State LEDs (page 5) 3-PRESET SELECT/STORE, used to store and recall presets (page 10) 4-TEMPO, used to manually set the master modulation tempo/rate (page 7) 5-LOCK, used to maintain current tempo upon recalling a preset (page 11) 6-MOD Section, section with option of four different modulation effects (page 8) 7-TREM Section, section controlling a tremolo effect (page 8) 8-PAN Section, section controlling a modulated panning effect (page 9)

  • Page 5: Top Panel Display Screen

    Top Panel Display Screen At the center of the Mod Rex’s user interface is the four-digit display screen at the top of the unit. This display screen has three main modes, each displaying different information. The three modes are DIVISIONS, TEMPO, and PRESET. One of the three labeled LEDs to the left of the display screen will be lit to show you which of these three modes you are in.

  • Page 6: Tempo Display Mode

    BPM with no decimal places, but the actual modulation will be perfectly in sync to the external source, even if it has a fractional component. The Mod Rex has a minimum tempo of 10 BPM and a maximum tempo of 500 BPM.

  • Page 7: Modulation Parameters

    It can also be set via tap tempo or an external device. These situations are good for creating precise rhythmic based effects. If you want to use the Mod Rex as a more traditional modulation pedal (less concerned with the exact modulation rate in BPM), you can switch the TEMPO knob into Rate Knob Mode.

  • Page 8: Mod Section Parameters

    FALLING SAWTOOTH: This shape is the opposite of the rising sawtooth. Over one modulation cycle a modulation slowly falls from its maximum point to its minimum point and immediately resets to its maximum upon the next modulation cycle. This setting is good for creating sharp rhythmic effects. SQUARE: With this shape over one modulation cycle the modulation alternates directly between its maximum point and its minimum point with no smooth transition between.

  • Page 9: Pan Section Parameters

    PAN SECTION The PAN section, when in stereo operation, modulates your signal between the left and right output. In mono operation, in effect the PAN section acts as another TREM section, but with the wave shapes all inverted. DEPTH: The depth control affects the spread of the modulation. At maximum, your signal will modulate from 100% in the left channel to 100% in the right channel.

  • Page 10: Presets

    Presets The Mod Rex can store and recall up to 100 presets. Upon powering up, the Mod Rex will load the last used preset. LOADING A PRESET To load a preset, start rotating the PRESET SELECT/STORE knob. As you rotate through, the preset number shown in the display will blink.

  • Page 11: Blank Presets

    BLANK PRESETS When scrolling through preset numbers, you may notice some preset numbers have a dash in front of them. This means that there is no preset stored in that location yet. If you load one of these “blank” presets, you will load an initialized state with the following settings: Tempo = 120BPM All Four Divisions = 0 (off)

  • Page 12: Factory Reset

    FACTORY RESET The Mod Rex ships with 20 factory presets that you can overwrite. If at any time you want to erase all presets you have made and restore the factory presets shipped with the unit, you can perform a factory reset.

  • Page 13: Footswitches And Jacks

    POWER Plug the power adapter supplied with your Mod Rex into the jack on the top of the pedal. The Mod Rex expects between 9VDC and 10VDC on a center-negative plug. The Mod Rex draws about 100mA. It does not accept batteries. Using the wrong power supply may cause damage to your Mod Rex and void its warranty.

  • Page 14: Expression Pedal

    TRS plug, and outputs the reference voltage on the ring of the TRS, the same as all Electro-Harmonix effects. The expression pedal controls the rate of the modulation. There are two expression modes.

  • Page 15: Midi And The Mod Rex

    MIDI TEMPO SYNC To sync the Mod Rex with an external device via MIDI, plug a cable into the MIDI IN jack on the Mod Rex from the MIDI Out jack/cable on an external device. It is up to the external device to create and send all MIDI Real Time messages.

  • Page 16: Midi Cc Message Assignments

    FILTER Depth *Expression input via MIDI only works when nothing is plugged into the physical EXP jack on the Mod Rex **For MOD/FILTER R-INV, a 0 will result in it being off, any higher number will result in it being on...

  • Page 17: Factory Presets' Parameter List

    Factory Presets’ Parameter List A grayed-out parameter means that in the set configuration that parameter has no effect and is set to a default state. Preset TEMPO Div. Type FALL FALL FALL Shape 100% 100% Depth Feed. R-INV TREM Div. TREM RISE FALL...
  • Page 18 Preset TEMPO Div. Type Shape Depth Feed. R-INV TREM Div. TREM FALL FALL RISE FALL FALL Shape TREM 100% 100% Depth Div. Shape 100% Depth FILTER Div. FILTER Type FILTER RISE FALL RISE RISE FALL FALL Shape FILTER 100% 100% 100% Depth Res.

  • Page 19: Warranty Information

    - WARRANTY INFORMATION - Please register online at http://www.ehx.com/product-registration or complete and return the enclosed warranty card within 10 days of purchase. Electro-Harmonix will repair or replace, at its discretion, a product that fails to operate due to defects in materials or workmanship for a period of one year from date of purchase.

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