I was looking on Amazon, and I noticed, as Chris B. above says, some artists are only selling MP3 files. (By the way, Chris, DVD players also play CDs. That's what I'm using. No multichangers, though.)
This is very good news for unaccompanied singers and those whose chosen instruments are in the normal human voice range. To my ear, they seem unchanged in MP3 format.
Sorry about the piccolos and double basses.