i tried the knife drop with an expression pedal (yamaha FC7) on EXP & EXP+AUX modes and it didn’t respond. I set it up by varying the settings from toe down to heal down and then no change in the audio going back and no change in the LEDs. This expression pedal works on a non-eventide uni-vibe clone pedal i have, which has an expression pedal input, as well as works on a keyboard i have and controls the mod wheel.
Not sure i have anything else to try the OSU with.
Maybe a bad expression pedal jack???
