What Dan said is correct. When you save your BIAB song, if you use the same name as the MP3 file, BIAB will then load both next time. This can be a useful feature.

BIAB has two main song file types: SGU, which has no MIDI melody, and MGU, which does. Think of the M in MGU as a song that has a Melody.


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.