Neil, I'll be up in the Northern tropics for 7 to 10 days, but I note that the NoteWorthy Composer site (or one of its linked user sites) has files of MIDI chords already prepared. I won't have time before catching a plane tomorrow, but will attempt to follow up after my return.

Regards, John

PS Both tacet and tacit are appropriate in the context that I referred to. My intention really was that there is little or no data in the accompaniment tracks to analyse.