This is getting more interesting.

First, it is normal that a jazz song does not use frequent key changes. It’s expected that there may be frequent modulations. The bridge key may change but not elsewhere.

Increasingly, I see more complicated compositions just written in C concert, with no attempt to reduce the accidentals by key signatures.

As my earlier reply indicated, I don’t know if it makes a difference for you to enter frequent key signatures in BIAB. The program does use AI but it’s proprietary how it works. We are pretty sure it has a ‘look ahead’ capability to see the possible key change just from the chord progression.

BIAB 2024 Win Audiophile. Software: Studio One 6.5 Pro, Swam horns, Acoustica-7, Notion 6; Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus Studio 192, Presonus Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors