We recommend using an expression pedal with a 10-50 kΩ linear potentiometer.  It should have a 1/4" TRS plug with the pedal-supplied voltage on the ring, ground on the sleeve, and return voltage on the tip.


Here are some examples that we have tested:

Dunlop DVP4 Volume (X) Mini Pedal

M-Audio EX-P (switch set to "M-Audio")

Mission Engineering EP-1

Moog EP-3

Old Blood Noise Endeavors Expression Slider

Roland EV-5


Moog EP-3

Set the switch on the bottom to "STANDARD" and turn the maximum value knob on the right side fully clockwise.


Roland EV-5

Turn the minimum value knob fully counter-clockwise (0).