I haven't tried it but EXP CC is likely the CC# you would use for MIDI expression control.Thanks for your explanations in this thread! It really helps. I'm just exploring the MIDI functionality on the sy200 with my MC8.
Do you know what EXP CC and EFFECT CC is for? I assume with EFFECT CC I can turn on/off the effect loop. I'm not using the effect loop at the moment, but maybe some time later.