Yesterday I transcribed a Brazilian jazz song by Elaine Elias. It had G7, Csus at the end of the eighth bar, and most times you would expect the next chord would be FMaj7. When I saved the song, BIAB suggested that the key of the song was F major.

The first chord of the song was DMaj7 and the key of the song was actually D major. That next chord wasn’t an F but a B half diminished (m7b5). Surprise.


BIAB 2026 Win Audiophile. Software: Fender Studio One 8, Swam horns, Acoustica-7, Notion 6, Song Master Pro, Win 11 Home. Hardware: Intel i9, 32 Gb; Presonus Quantom HD8 & Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors.