Uncompressing a compressed file makes no improvement to the audio.

BIAB provides a utility to do exactly that with compressed WMA RealTracks, along with a caution not to expect any difference in audio quality. It did provide slightly faster operation in the early days of ReslTracks.

I asked about uncompressed files because I wonder if the absence of the original dynamic range, or the absence of the upper harmonics, make any difference in the algorithm’s ability to distinguish between, say, a guitar and a bass or a bass and a tuba.


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.