Yeah, it's difficult to tell from that. It merely says it supports receiving program change. Trying, to get a clue, I put a MIDI monitor on the output and when you change registrations, it shows a slew of various parameters going out (as expected) but mixed in there are program changes for the Upper L1, Upper L2 and Lower MIDI channels (as setup in settings)...these are channels 1,2,3 by default. But also in there is a program change for channel 5. Does anyone know what that is? I can't find any configuration with a MIDI channel of 5. I was hoping maybe that you would be able to send to some particular channel (5?) to change registrations.