Ok, then it's not a Mac/ProTools/OMS/Digi001 problem (assuming you've got your MIDI track input set to 'all' or the MIDI channel you're inputing from). I'm not to familiar with the MPC, but I can only think that if it's got a MIDI A and B output, and A is happily playing your XP-80, then the MPC is not set correctly to output it's sequence from the B port. That might be an internal setting, or you need to copy the MIDI track on the A side over to one of the B MIDI tracks. Once again, I'm not up with the MPC, so apologies if that doesn't seem right, but it is a 32 track sequencer, right? That is, with 32 tracks divided into two independent sets of 16 (ie. A and B)? Phil