MusicBrainz: AboutMusicBrainz - MusicBrainz: "About MusicBrainz
MusicBrainz is a user-maintained community music metadatabase. Music metadata is information such as the artist name, the album title, and the list of tracks that appear on an album. MusicBrainz collects this information about music and makes it available to the public so that music players can retrieve information about the music that is playing."
