hey odeonmaxx, both SC and MJMP are on the money, it would seem a mismatch between the midi channel out put (sent) from your pedal to the MP1 midi receive channel. This can be midi ch 1 to 16 but each end needs to match or use the "ALL" channel catch all on the receive end (simplistically, so different midi enabled gadgets can talk to each other on different midi channels if you want). Typically (unless you have a more complex midi setup (which you don't)), a midi device (in your case the pedal) is sending out midi change information (in you case program change (i.e. go to program/patch 20)) on/over one of the midi channels (1 to 16) This channel assignment BTW is adjusted in the pedal. The receiving device (in your case MP1) listens to these messages on midi channels you tell it to (e.g. pedal send on midi ch 1, MP1 set to listen on midi ch 1 which is what SC is saying, they have to be set to the same midi channel). Most midi gadgets, MP1 included, can listen to all midi channels at the same time ("All" is the setting, and what MJMP is saying), so it won't matter what channel your pedal is using to send midi change info (1 to 16) as the MP1 is listening to them all and will respond.