Originally Posted by DrDan
Here is my two cents. BIAB can interpret the key when new midi is input. Otherwise, it is "set and forget". You can use F5 to change the key in the middle of you song, but that only effects the notation Key Signature. You can also manually change chords, but neither of those actions will change the selection of scales BIAB uses over the chords based on changing the key center. In other words, the I chord is always what is set in Key entry section of the GUI.
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I would like to examine this a bit. We know that BIAB may make selection of chord sounds and notation enharmonic spelling based on the key signature. But if you change the key signature in the song, does it still follow the guidance of the original key signature, or might it adapt to the new one? I really don't know.

BIAB 2025 Win Audiophile. Software: Studio One 7 Pro, Swam horns, Acoustica-7, Notion 6, Song Master Pro, Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus 192 & Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors.