Jim, I don't think that is what the OP is asking.

He is asking BIAB to play a simple triad (F) and instead he is hearing a dominate chord (F7).

Simply put, BIAB plays what the style directs (if midi) or what real tracks are available. I assume you are talking about midi, since the real tracks would not generally do that substitution.

Please confirm if I have this right, and then we can talk about some of the limited controls you have over midi voicings and chord selection. (By the way this is a hot topic right now over in the wish list forum).

dan

BIAB – 2025, Reaper (current), i7-12700F Processor, 32GB DDR4-3200MHz RAM, 1TB WD Black NVMe SSD, 2TB WDC Blue SSD, 1TB WD Blue, 2 TB SK NVMe, 6 TB External, Motu Audio Express 6x6