This may be a dumb question but if you don't ask... well then you probably won't look stupid. But I'm not worried about that. Is it possible to bring your own MIDI performances into BIAB and make your own Supertracks? If so, can you regenerate them like other Supertracks?

It has been asked for many times !!
You can integrate Biab and the Biab Plugin with ReaTrak
it will let you create your own midi, audio or both tracks along with shots n holds that will fit to any chord progression in Reaper, it will import the chords from Biab or Biab Plugin into Reaper and it will also let you generate up the RealDrums directly in Reaper allowing more control over what you need.
You could then import the midi or audio tracks from Reaper into Biab.
Works on Both Mac and Win.
Sample Instrument and Drum Tracks, Midi, Audio, Multichannel Drum Tracks

Watch Video Demo: https://www.dropbox.com/s/ljz256b30ar3kxp/ReaTrak-User-Midi-Audio-Tracks.mp4?dl=0


Biab Drums in reaper:

Thanks! I installed ReaTrack a couple of weeks ago but haven't had time to delve into it (that and about a dozen new VSTs and a few Reaper themes to mess with). I'm hoping work will slow down a bit and let me make some music!