[Agama]

MP3's (256 kbps) played back through a decent hifi or good headphones certainly sound a bit lifeless compared to CD (16-bit, 44.1khz), and CD itself loses out on some low level detail and ambience compared to a good vinyl playback system. But to be fair to AnnieWalker, she does say that she has 5000 records and talks about tagging CD's, so maybe these are her primary formats and not MP3. Maybe izotope ozone 5, (whatever that may be), helps alleviate some of the losses of compressed audio formats.

In terms of using calibre for tagging and cataloging a music collection it could be very good, but there would then need to be a way of opening a music file from with calibre by linking to the user's preferred music player, and of sending the music to a device. Music formats would obviously need to be disabled from book conversion and I'm not sure how playlists could be supported.

One book related use for such capability within calibre would be for managing audio versions of books.

Calibre is very good at what it does, (and is continually improving), so maybe digressing into music/audio management would slow down the main development.