To quote from the FAQ on the Support page:
Which Expression Pedals are supported?
Our
Stompboxes will work with any Expression Pedal that is a simple
resistive load (potentiometer) with a max value of 25kOhms. For the best
performance we recommend the Ernie Ball VP Jr. 25k.
Connect the Output to the Eventide Stompbox Expression Pedal Input. We
have also had success with the M-Audio MGear EX.P Expression Pedal.
I use a Line6, others have used Roland (you may have to adjust its calibration knob), etc, etc.
Where people have problems is when they use high-impedance volume pedals. If you stick to the above you should be OK, but we cannot guarantee that it will work with any and all pedals, cos they may be weird or unusual.
