Can you not audition the tracks from within your song? Click the track in the mixer window. You are offered several options including real tracks (best, chording, soloist, previously used). when you find a candidate and select it, it will generate and play. Only the selected track is generated (as far as I can see). If you don't like it, repeat the process and eventually save the song (or not)


BIAB for Windows Version 2019 (643)
Windows 10 (1909)