I’ve been having a similar problem, that occurred yesterday, and a few times in the past.

A BIAB Song file that was fine and played through okay, would, after regeneration, or simply upon opening the file a second time, become inaudible upon playback. Swapping to either ASIO / WASPI / MME had no effect.

Yesterday, my song was playing okay, but when I swapped the Style in my Song to ‘FORTIFY.STY Fortifying Cool Bossa Horns’, the song became inaudible; eventually BIAB crash down.
I tried the song again with the previous Style, and it played back okay.

Yet the Style: ‘FORTIFY.STY Fortifying Cool Bossa Horns’, plays back okay with other BIAB songs; a few other Styles created the same issue, but not all of them.

I tried some of the solutions in this forum, but to no avail.

I found the only solution was to create a new BIAB Song file, and Copy & Paste everything from the old file, and it works okay now; its as if the file becomes corrupted somehow.

To coin a phrase from the Americas – “It’s a thinker”