I understand. I'm not sure of the solution. Yes, BIAB is limited to time signatures of 2/4, 3/4 and 4/4, so all other time signatures are simulated by variations on those.

Are you exporting Music XML from Sibelius, and importing that into BIAB? If you are working with MIDI, try the Music XML instead.


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.