DigiTech RP70 Owner's Manual page 39

Expression assignments available are as follows:
No Assignment OF
Volume Pr (Output Level Pre Delay)
Volume PS (Output Level Post Delay)
Wah AH (Expression Pedal acts as a Wah pedal)
Amp gA (Expression Pedal controls the Amp Gain)
Chorus SP (Speed) LE (Level)
Flanger SP (Speed) LE (Level)
Phaser SP (Speed) LE (Level)
Tremolo SP (Speed) dP (Depth)
Panner SP (Speed) dP (Depth)
Vibrato SP (Speed) dP (Depth)
Rotary SP (Speed) dP (Depth)
YaYa Pd (Expression Pedal acts as a YaYa
AutoYa SP (Speed) dP (Depth)
Envelope Filter ES (Sensitivity)
Detune LE (Level of the Detuned signal)
Pitch Shift LE (Level of the Pitch Shifted signal)
Whammy HY (Expression Pedal acts as a DigiTech
Delay dL (Delay Level) dF (Delay Feedback)
Reverb rL (Reverb Level)
Effect when engaged)
TM
Whammy pedal)
® TM
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