In case anyone is interested in trying it out, I have a basic random MIDI sequence-producing application available: Mac OS X version: http://homepage.mac.com/usefulsoftware/RandomMIDIX.sit Mac OS version: http://homepage.mac.com/usefulsoftware/RandomMIDI.sit If you'd like to look at the stack file, just send me a message. Thanks to all that offered suggestions! -Kurt