Thoughts:

The audio tracks you export from BIAB are 16 bit/44.1, or CD quality. If SONAR defaults to a different bit or sampling rate, perhaps that would cause a problem, especially if there are already tracks of a different rate in the same project. Not sure, never tried that in SONAR.

I would also reboot and then load each program fresh and try again.

Does the tempo in your MIDI file remain at the same value?


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; Roland Integra-7, Presonus 192 & Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors.