yes - from channel 0 to 1 was a quick and dirty fix but i did look at the event list just now. the bass is on channel 13 in the list and the wrong sounds are on channel 14 - but as it was a midi track generated by RB using a chord chart from acw and one of the very old built in midi styles (Literok) from BIAB i'm stumped as to why RB inserted channel changes