-- ../test-music/010-waltz.m4a
- MPEG-4 audio (AAC LC), 30.66 seconds, 128869 bps (audio/mp4)
----:BDJ4:DANCE=MP4FreeForm(b'Waltz', <AtomDataType.UTF8: 1>)
----:BDJ4:DANCELEVEL=MP4FreeForm(b'Easy', <AtomDataType.UTF8: 1>)
----:BDJ4:DANCERATING=MP4FreeForm(b'Great', <AtomDataType.UTF8: 1>)
----:BDJ4:NOTES=MP4FreeForm(b'NOTES3 NOTES4 \xc3\x84\xc3\x84\xc3\x84\xc3\x84\xc3\x84\xc3\x84\xc3\x84\xc3\x84', <AtomDataType.UTF8: 1>)
----:BDJ4:STATUS=MP4FreeForm(b'New', <AtomDataType.UTF8: 1>)
aART=010-albartist
keyw=tag1 tag2 tag3 m4a bpm
tmpo=84
trkn=(10, 0)
©ART=010-artist
©alb=010-album
©gen=Rock
©nam=010-waltz
©too=Lavf58.45.100