That does look interesting, but I have code that relies on Music21 and I am not doing anything fancy as far as MIDI goes, just writing out files.
I am hoping buried somewhere in a library file is a value I can change to another number and output only chord symbols to another midi track instead of track 1. I am looking for seperating the notes from the chord symbols and notes I am writing into the same channel. I do want the chord notes, but not mixed in with melody notes. I am doing it manually now by moving the chords to another track temporarily.