Hi again Daivid,
Just a PS to my note above. In the midi file format definition the word 'tracks' is used as well.

This use of 'tracks' is totally different to how Composer defines tracks. The midi Tracks are sequential streams of MIDI data which may contain information for upto 16 midi channels. Any you can have multiple tracks.

But this has nothing to do, I believe, with Composer's use of the word tracks.

Cheers ... Clyde