Peter Ostry <po@ostry.com> wrote: > Do you have MidiMonitor? If not, download it and let it > run while you play. Filter the clock and/or active sense > of the MOTU to see only relevant data. MidiMonitor should > show you if some weird things come from the keyboard. > Your problem sounds a bit like a MIDI loop. Thanks for your response. I downloaded MidiMonitor and have run several tests. There doesn't seem to be a particular type of message that causes the stalls, or a particular number of messages. I don't have any other MIDI gear conneted, so I think a loop can be ruled-out. Any other ideas?