What is meant by quality?
Just to build on what others have said…
If we’re talking about CD vs vinyl, it’s a matter of opinion which sounds better. I personally think CDs have the best sound quality, but a big reason vinyl has made a comeback is because many think it has a better sound.
Now, if we’re talking compression formats, it’s basically a matter of “lossless” vs “lossy”.
Lossless means there is no audio data lost from the original recording, so no reduction in sound quality. A WAV file is the raw original audio and is completely uncompressed. Lossless compression algorithms include FLAC and ALAC, and slightly reduce file size without affecting sound quality.
Lossy compression, like MP3 or M4A, cuts out many of the wavelengths inaudible to human ears to greatly reduce the file size, but also cuts out some that are audible, which affects sound quality. Many people can’t tell the difference, but nitpicky audio snobs like myself can
Anywho…
I’ve mentioned on this site before that I collect pro wrestling entrance music. I do my own curating, editing, mixing, and mastering. I try to get everything in the best quality possible and make the music arena-accurate (I’d estimate 50% of the music WWE has officially released does NOT match the actual arena-used music, whether it’s a different mix, different edit, has extra sound effects, etc).
If there’s any WWE music anyone is looking for, I can probably get it for you