Re: volume/expression pedal's
i use my ernie ball volume pedal as a midi continuous controller (expression) pedal with my rocktron midimate ... the midi mate accepts a RTS stereo plug ... ring is send and tip is return (or vice versa) .... i use a stereo splitter to isolate ring and tip on their own cable ends and connect them to each side of the volume pedal and i am good to go .. depending on the patch, i can controll anything that the midi device can be prgrammed for
good luck
t4d