Update - Able to repro the issue in Build 722. I'm not really interested in rolling back to a previous version for this one issue, so here's my temporary solution. I am not mixing any audio in my tracks - just MIDI and RealTracks.

Workaround:

- Before export to M4A, expand the mixer to show the Audio track and change the volume to zero.
- After export, delete the audio from the modified MGU file and re-save the file.
- If necessary delete the extraneous WAV, or other file that was left behind during export. This has been an intermittent issue that I've had since BIAB 2018 during conversion to compressed formats.


Ed Z

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https://soundcloud.com/user-415064494
BIAB user since 2019
iPad Mini, Garageband for iOS, BIAB for Windows 2020 UltraPAK, Xtra Styles packs 6-9, Windows 10 Lenovo PC, Kontakt Player, SpitFire LABS, SampleTank 4 CS, some Soundfonts