Hey Mike, sorry for the confusion. The file in question is a BiaB song file, not a MIDI file. I guess it's a *.mgu since it has a melody. The file contains four real track instruments and one MIDI instrument. I's the lone MIDI instrument that is stuck on acoustic piano. I don't consider it significant that it is a single MIDI instrument being grouped with a bunch of real tracks, since I have several other song files that are similarly set up.