Integrating BB and BB Plugin with Reaper is easy with ReaTrak
https://forum.cockos.com/showthread.php?t=212645
www.ReaTrak.com

It is easy to install into Reaper.
Will import the chords from Biab or Biab Plugin into Reaper.
It will snap any midi to the chord track or scale.
Has a chord snap guide for manual snapping.
Will generate up your Biab RealDrums directly in Reaper giving more control and adjustment of the sections to best suite your needs.

Videos:
https://www.youtube.com/channel/UCh5e60yfThGwTcPuj86v1WA/videos

Get the latest RealDrums and Chord Sheet updated scripts here:
https://forum.cockos.com/showthread.php?t=212645&page=5
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ReaTrak Integrate Biab & Plugin in Reaper
Free Biab & BiabVST Chord Picker Tool