Under the F5 option you can tell BIAB to change key at any bar. I just tried this and was a bit surprised not to see the chords automatically change at that point, but I suspect telling BIAB that the key has changed at that bar, combined with the manual adjustment of the chords to the new key, will permit the engine to recognize the new tonal center.


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 ).