One thing i though of was to use Real Band instead of BiaB, and then to trigger the harmonies duplicate the piano track, or accoustic guitar , and route that to the TC, and the original to softsynth.


HP Win 11 12 gig ram, Mac mini Sonoma with 16 gig of ram, BiaB 2025, Realband, Reaper 7, Harrison Mixbus 9 32c , Melodyne 5 editor, Presonus Audiobox 1818VSL, Presonus control app.