Among the many tips in the article I wrote here
https://www.pgmusic.com/forums/ubbthreads.php?ubb=showflat&Number=694482#Post694482 Is the concept that the more specific you are in BIAB with upper extensions, the better. To do that, you should know chord theory.

Here’s an example. When you write “a 7th”, you will get a dominant (minor) 7th if you just write 7. If you want a major 7th, you have to write that. But do you know what kind of 7th you will get if you write a 9th chord? When you enter D9, you don’t tell BIAB about the 7th. This is the same playing notation on sheet music.

It gets worse the higher you go. When you write a 13th chord, will it include the 9th? Which one - natural, flatted, or sharped? Will it include the 11th, and might you prefer a #11, especially in a chord at the end of a phrase unless it’s a minor 11? Which will BIAB choose? In that 13th chord, where is the 13th voiced? Will it clash with the 7th (a half step away)?

Tip: any number above seven, just subtract seven to find the pitch. Then all you need to know is in what register (octave) it will sound.

If you don’t yet know the music theory about this, your ears can generally give you the hint if the chord isn’t right. Play the song. Do you like the sound? Or, press Shift+Enter to audition a specific chord. Do you like the sound?

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; Presonus 192 & Faderport 8, Royer 121, Slate VSX, Adam Sub8 & Neumann 120 monitors.