I'm using a polar TI with a yamaha FC7 (volume pedal). I like playing patches with long delays and I like swelling in and out of the patch with the volume pedal. The problem is when I cut the volume with the pedal it also cuts the volume of the delay feedback. For some reason my motif does it without a problem and so does the nord wave. I've tried changing the control pedal to controller #91 which is patch volume. That didn't work either.