You're probably asking because you cannot enter either of those into BIAB.

You can enter Abmaj9#11 but not Abmaj7#11.

You can enter Abmaj7b5 but not Abmajb5.

Abmaj9#11 sounds a bit more complex than Abmaj7b5 as implemented in BIAB MIDI, but they are very similar. The b5 is the same note as the #11, just down an octave in the voicing. Played by Real Tracks, I don't think you would hear a difference.


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.