Matt, I don't think if a track is frozen that any audio is created. I did a Chord Sheet of 8 bars using a RealStyle with 5 instruments - Bass, strumming ac guitar, drums, FP ac guitar and another FP ac guitar.

I saved the file with no tracks frozen and the sgu file was 3.3 kb
I saved the file with one track frozen and sgu file was 11.2 kb
I saved the file with all tracks frozen and the sgu file was 42.3 kb

While there is a significant increase in size of each subsequent sgu file, it appears to me this is due to additional data content and not audio.

It's my opinion there's no audio created in a BIAB project until a track is either saved or rendered and that no physical audio of a track exists until a render is saved in an audio format. Until then, I think it's only data instructions detailing where and what RealTrack audio file to use. That's my speculation.

BIAB 2025:RB 2025, Latest builds: Dell Optiplex 7040 Desktop; Windows-10-64 bit, Intel Core i7-6700 3.4GHz CPU and 16 GB Ram Memory.