Quote:
If I bring the tracks into Reaper as wav files, everything works fine. But I do know that a midi track has a different set of rules than an audio track.


But I assume you don't know what those rules are? grin
A midi file dragged into reaper will have no sound. You need to assign a VST to the Reaper track in order for the midi to play a virtual instrument. Like midi in any DAW.

But that is the easy stuff. Are you telling us you have not crashed the BIAB-VST- 4.2.8 in Reaper? crazy You must be doing something right.

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BIAB – 2025, Reaper (current), i7-12700F Processor, 32GB DDR4-3200MHz RAM, Motu Audio Express 6x6 - My SoundCloud (Tip: No need to create a SC account to hear music - just hit ESC ).