Home › Forums › Products › Stompboxes › Aux switch and BOSS FV-500L expression pedal with H9 › Reply To: Aux switch and BOSS FV-500L expression pedal with H9 June 28, 2015 at 2:30 pm #139483 nickroseModeratorEventide Staff Go to system mode, set autocalibrate to on, wiggle the pedal, then turn it off.
