======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '56'
                                          'artist'  'Kraftwerk'
                                     'text_people'  'Florian Schneider/Ralf Hütter'
                                         'release'  'Trans-Europe Express'
                                           'title'  'Endless Endless'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-2', "
 "'Q-OLDST-3', 'q-syn-3', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-1', 'q-other-4', 'q-vocals-1', 'q-mixbeat-3', "
 "'Q-PIANO-3']")
                                      'lastfmtags'  "['german', 'electronica', 'electro', 'electronic', 'synthpop']"
                                     'discogstags'  "['electronic', 'electro', 'synth-pop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '7'
                                      'tracktotal'  ''
                                            'date'  '1977'
                                        'comments'  ''
                                           'genre'  'electronic-we-electropop or synthpop'
                                             'bpm'  '112.696'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================

'COMM:ID3v1 Comment:XXX'                            '7+0A5DE5B900AE6B28C4A5EC2346'
'COMM:iTunes_CDDB_IDs:eng'                          '7+0A5DE5B900AE6B28C4A5EC2346AC0356+807529'
'PRIV:WM/MediaClassPrimaryID:¼}`Ñ#ãâK\x86¡H¤*(D\x1e'  PRIV(owner='WM/MediaClassPrimaryID', data=b'\xbc}`\xd1#\xe3\xe2K\x86\xa1H\xa4*(D\x1e')
'PRIV:WM/MediaClassSecondaryID:\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'  PRIV(owner='WM/MediaClassSecondaryID', data=b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
'PRIV:WM/Provider:A\x00M\x00G\x00\x00\x00'          PRIV(owner='WM/Provider', data=b'A\x00M\x00G\x00\x00\x00')
'PRIV:WM/UniqueFileIdentifier:A\x00M\x00G\x00a\x00_\x00i\x00d\x00=\x00R\x00 \x00 \x00 \x00 \x001\x001\x002\x000\x009\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x00 \x00 \x004\x007\x000\x006\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x001\x005\x004\x002\x001\x002\x003\x00\x00\x00'  PRIV(owner='WM/UniqueFileIdentifier', data=b'A\x00M\x00G\x00a\x00_\x00i\x00d\x00=\x00R\x00 \x00 \x00 \x00 \x001\x001\x002\x000\x009\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x00 \x00 \x004\x007\x000\x006\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x001\x005\x004\x002\x001\x002\x003\x00\x00\x00')
'PRIV:WM/WMCollectionGroupID:K\x02\x0cè+\x03pI´\x13Ð\x0b\x85]\x13U'  PRIV(owner='WM/WMCollectionGroupID', data=b'K\x02\x0c\xe8+\x03pI\xb4\x13\xd0\x0b\x85]\x13U')
'PRIV:WM/WMCollectionID:K\x02\x0cè+\x03pI´\x13Ð\x0b\x85]\x13U'  PRIV(owner='WM/WMCollectionID', data=b'K\x02\x0c\xe8+\x03pI\xb4\x13\xd0\x0b\x85]\x13U')
'PRIV:WM/WMContentID:\xa0¿Åb®£\tO\x88#