If BIAB sees both a .WMA file and a same-named .WAV file in the same place, it uses the .WAV file.

This can occur in one of two ways:
1) you uncompressed the .WMA files, making them into .WAV but keeping the same audio quality, or
2) you have the audiophile version, in which case you have purchased uncompressed higher-quality .WAV files

There is a slight speed advantage to using method one, even though the quality of the sound is unchanged, because BIAB does not have to uncompress the file first. And of course, the audiophile files would also load slightly faster.

If you have the audiophile version, yes, you may delete all the .WMA files.

If you do not have the audiophile version but chose to uncompress all the .WMA files to .WAV, you may also choose to delete the .WMA files.

Keep in mind that, if you do delete all the .WMA files, since they are about one-tenth the size of the corresponding .WAV files, you are only saving about one-eleventh the total space. It's a lot of work to go through for that small a benefit, and then you have to do it all again next update.


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.