I now understand how to set up rules in Stream Byter to map specific note-on events to specific Program Change commands. THANK YOU, Nic!
However, I am wondering if there is a way in Stream Byter to set up a simple rule or rules whereby a particular range of MIDI note numbers near the middle of particular keyboard (e.g. note numbers 60-71 -- the octave beginning with middle C) are mapped onto 12 program change commands in the range of 1-12.
I know how to do this by creating 12 separate rules for each mapping, but I'm wondering if there is some simple rule whereby I can tell Stream Byter to subtract 60 from all resultant Program Change commands so that what would otherwise be output as program changes 60-71 would be output as program changes 0-11 respectively.