Q: Which expression pedals can I use with my VL3 A: We support (generally speaking) pedals that are wired like a Roland pedal and don't support Yamaha style wiring.    There are some converters out there (or you can DIY) to swap the two wires that make a Yammy into a Roland electrically. Here's the forum thread it came from   So far, we know that the following pedals don't work correctly: Yamaha FC-7 Behringer FCV100    Pedals we know work correctly (with calibration of course): M-Audio EXP (in M-Audio mode)