I've just got hold of an MC303 Groovebox but I find that if I just want to use it as a 'Rhythm Machine' sound source (not in Module mode) then just about everything that's coming out of the sequencer (Cakewalk express 6) on all channels plays through the 303. Even muting the 303 on all 8 parts doesn't stop this. Any help would be great!! Thanks S.