So I take it that one of the many things I don't know about RB is that it does MIDI clock. I never had a reason to look into that. So out of my interface into my drum machine and the computer will send the pulses to the drum machine.... Been so long since I did that that I don't remember when I did it last, and if the drum machine did the clock or the synth that had the sequencer in it. I think it was the Ensoniq ESQ-1 but I'm not sure. That'd be like 1991 and that was followed by 16 years of retirement.