Have a look here and see if there's anything that may help:

https://www.pgmusic.com/forums/ubbthreads.php?ubb=showflat&Number=466834#Post466834

http://www.jososoft.dk/yamaha/more_software.htm

https://www.heikoplate.de/xftool-manual.html

https://www.heikoplate.de/psruti.html

What you need is for Biab to load all the data for each track in a Style then it can playback the chords inputted by the keyboard live the same way Sforzando is here:
Live Arranger Demo

The same way the BBPlugin can generate and play instantly:

Playing 4 style tracks same as in Biab, same sections.
So each track's WAV Instructions txt were converted into SFZ txt.
This is playing the source files direct, no waiting for renders.

Watch: https://www.dropbox.com/s/w91dqq7dcnaluyd/BB-Track-Data-To-SFZ-4-Tracks.mp4?dl=0