Expression Pedal; External Clock And Foot Controller - Electro-Harmonix MOD REX Manual

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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. You can change the expression mode by holding down the FILTER DIVISION
knob until all three LEDs to the left of the display light and "E - -" followed by a 1 or 2 is
displayed. Turn the FILTER DIVISION knob to choose between the two Expression
modes:
E - - 1: In Expression mode 1, the master modulation tempo, set manually or via
tap/MIDI clock/external pulse clock, is the speed of modulation with the expression
pedal set to heel. As you bring the expression pedal to toe, the modulation speeds up.
E - - 2: In Expression mode 2, the master modulation tempo, set manually or via
tap/MIDI clock/external pulse clock, is the speed of modulation with the expression
pedal set to toe. As you bring the expression pedal to heel, the modulation speed slows
down.

EXTERNAL CLOCK AND FOOT CONTROLLER

The CLK/FC jack can be used in a few different ways. This jack can accept an external
pulse clock, such as from an Electro-Harmonix Clockworks, or a standard foot
controller/foot switch to toggle presets up and down. This jack can also accept an
external tap switch.
In order for this jack to work properly, you must set which mode you intend to use it in.
Hold the MOD DIVISION knob until all three LEDs to the left of the display light and
either "- FC -" or "CLOC" are displayed. Turn the MOD DIVISION knob to choose
between these two modes:
- FC -: In this mode, the CLK/FC expects a foot switch to bank presets up and down. In
this mode, the jack expects a TRS cable, and a switch signal on the tip (see foot
controller's manufacturer's specifications) banks the preset up while a switch signal on
the ring banks the preset down.
CLOC: In this mode, the CLK/FC expects either a pulse clock signal (such as from an
Electro-Harmonix Clockworks) or an external tap signal. Each clock pulse (or tap) will
represent a quarter note, and it will work similarly to how tap tempo works. To help
illustrate these two modes, imagine you plug a standard foot controller into the CLK/FC
jack. In -FC- mode, the footswitch that connects to the tip of the TRS cable (see
manufacturer's specifications) will toggle the preset up. Switch into CLOC mode, and
that same footswitch will now act as a tap tempo switch.