"qMI Four Channel Composition" [mp3 removed]
"qMI Three Channel Composition" [mp3 removed -- a revised version is here]
Recently added module -- Vermona's Quad MIDI Interface -- allows you to write polyphonic tunes with monosynths and/or mix four-part harmony in the synth's mixer without later overtracking. These are both done that way. Starting out nursery-rhyme simple; hope to be doing Bach by the end of the year.