MOD REX Polyrhythmic Modulator Congratulations on your purchase of the Electro-Harmonix Mod Rex Polyrhythmic Modulator.
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 7 Divisions – page 7 Tempo and Rate Knob Mode – page 7 LFO Shapes – page 7 MOD Section Parameters – page 8 TREM Section Parameters – page 8 PAN Section Parameters – page 9 FILTER Section Parameters – page 9 Volume – page 9 Signal Path – page 9 Presets – page 10 Loading a Preset – page 10
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.
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
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. Switching between these three modes is quick and intuitive.
TEMPO DISPLAY MODE In TEMPO display mode, the display shows the current tempo in beats per minute (BPM). To switch to TEMPO display mode, simply start rotating or press and release the TEMPO knob. The tempo can be set manually by rotating the TEMPO knob. The tempo can also be set by tap tempo or an external device.
Modulation Parameters Each of the four modulation sections has its own set of parameters, neatly grouped into sections. The Tempo setting affects all four sections. While the four sections share one bank of yellow LFO shape LEDs, each section can independently be assigned one of the four shape options. DIVISIONS Each modulation section has a DIVISION knob to set its tempo division, and to activate/deactivate the section in general (a division of 0 has the section inactive).
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.
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. As you bring DEPTH down, the modulation spread is lessened, or in effect “pulled back” into the center of the stereo field.
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. To select that preset, press and release (don’t hold down) the PRESET SELECT/STORE knob. Upon loading a preset, all current parameters will be overwritten by those saved within that preset.
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.
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. To perform a factory reset, unplug power from the Mod Rex. Hold down the BYPASS footswitch and MOD DIVISION knob while plugging power back into the top power jack. The display will show two dashes.
Footswitches and Jacks BYPASS: The BYPASS footswitch engages the effect. When the blue LED near the switch is lit, the effect is active. The Mod Rex features buffered bypass. TAP: You can use the TAP footswitch to set the modulation master tempo. Tap in quarter notes. The blue LED near the TAP footswitch always blinks based on the current quarter note. All LFOs do not reset upon a tap, but are synced/shifted to the nearest quarter note.
EXPRESSION PEDAL The EXP jack expects a TRS plug for use with a traditional, passive expression pedal. This jack expects the control voltage on the tip of the 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.
MIDI and the Mod Rex The Mod Rex accepts MIDI input from the standard 5-Pin MIDI IN jack on the top of the unit. MIDI can be used for three primary purposes, to tempo sync the modulation rate with an external device (via MIDI Real Time messages), to recall presets (via MIDI Program Change messages), and to control any parameter on the Mod Rex (via Control Change messages). The Mod Rex does not transmit any MIDI output.
MIDI CC Message Assignments 04 07 18 19 20 21 22 23 24 25 26 27 28 29 30 31 92 93 94 95 Expression* Volume MOD Type FILTER Type MOD Shape TREM Shape PAN Shape FILTER Shape MOD R-INV** FILTER R-INV** MOD Division TREM Division PAN Division FILTER Division MOD Feedback FILTER Resonance TREM Depth MOD Depth PAN Depth 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
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 11 12 13 14 15 16 17 18 19 20 VOL 52% 60% 60% 55% 60% 60% 66% 55% 70% 65% TEMPO 100 120 105 94 120 40 120 122 120 120 2 4 4 1 7 1 6 9 3 1 PHS CHR FLN FLN VIB FLN VIB PHS CHR VIB TRI TRI SQR TRI TRI TRI TRI TRI SQR TRI 80% 20% 50% 45% 25% 15% 15% 60% 35% 50% 55% 50% 25% 60% 50% 65% 50% 25% 50% 50% On Off Off Off On Off Off Off Off Off 9 7 9 3 4 0 4 4 9 7 TRI FALL FALL TRI RISE TRI TRI TRI
- 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. This applies only to original purchasers who have bought their product from an authorized ElectroHarmonix retailer.
