VorbisComment,date,year
VorbisComment,tracknumber,track
VorbisComment,musicbrainz_trackid,mbrainz_track_id
VorbisComment,musicbrainz_artistid,mbrainz_artist_id
VorbisComment,musicbrainz_albumid,mbrainz_album_id
MP4,MusicBrainz Track Id,mbrainz_track_id
MP4,MusicBrainz Artist Id,mbrainz_artist_id
MP4,MusicBrainz Album Id,mbrainz_album_id
ID3,ufid:http://musicbrainz.org,mbrainz_track_id
ID3,MusicBrainz Album Id,mbrainz_album_id
ID3,MusicBrainz Artist Id,mbrainz_artist_id
APEv2,musicbrainz_trackid,mbrainz_track_id
APEv2,musicbrainz_artistid,mbrainz_artist_id
APEv2,musicbrainz_albumid,mbrainz_album_id