The very helpful guys over at Reaper implemented the Windows Media Foundation codec to play the Biab compressed files on old or new hardware.
Here's your Biab Live Arranger playing wma direct
https://www.dropbox.com/s/g28fd8zss4me8h8/Biab-Live-Arranger-WMA.mp4?dl=0
so what Reaper is doing there Biab can do the same,
it would be good to put it in an easy programmed crossplatform language so you don't spend half the year on Win and the other half on Mac.
It just needs to be basic without all the Biab features.
When the user loads a style it just loads all the track data for those RTs and plays the user's chord input back direct from the wma/wav source file sections that are referenced in the data.
Or you can just wait till Yamaha do it frown