+1
Also chord input from hardware/software controllers and VST's.
Scaler, Chultu (I think spelling might be wrong) Kontrol products, etc.

I think whole "chord" logic segment is way dusty and outdated in BIAB. Pipeline picker is better. But what I would prefer is a Scaler VST type approach and a way to connect a keyboard or another type of midi controller to input chords into the BIAB chord grid.