I don't think I understand. The song contains one RealDrums track and three or four RealTracks tracks. Only the (RealDrums) drum track shows up in the MIDI file.

Maybe the problem is that I don't understand the relation between MIDI and Real(Drums|Tracks). I'm assuming that BiaB has an available internal MIDI representation of each track, whether BiaB realizes it, when I hit Play, as straight MIDI commands to Quicktime Instruments (or whatever the output system is), or as triggers to RealTracks samples. What I expected to get when I saved the file was the MIDI representation of all those triggers in all tracks.

If I'm wrong about that model, then two questions. First, why does the drum track show up at all in the resulting MIDI file? Second, how do I achieve a MIDI file that is the same as my BiaB song (except for the particular sampled sounds)? If the song uses one of the Styles that's built on RealTracks and RealDrums, do I have to go through selecting non-RealTracks and non-RealDrums output for every active voice in the song, and then save that as a MIDI file? That would be awfully tedious.