Music CD - CD disc, CD player can play it.

MP3 music disc - burn MP3 music files directly onto a disc. CD players cannot play it, but some DVD players can play it. Computer playback software can play it.

WMA music disc - burn WMA music files directly on the disc. CD players cannot play it, and most DVD players cannot play it. Computer playback software can play it.

MP3DVD music disc - similar to MP3 music disc, except that the files are burned on a DVD disc.

WMADVD music disc - similar to WMA music disc, except that the files are burned on a DVD disc.