======================== unified (from filesystem) ========================
                                         'bitrate'  '185.88'
                                        'duration'  '315'
                                          'artist'  'Calvin Harris'
                                     'text_people'  ''
                                         'release'  'I Created Disco'
                                           'title'  'The Girls'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-3', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['dance', 'electronica', 'electro', 'electronic', 'disco']"
                                     'discogstags'  "['electronic', 'pop', 'house', 'electro', 'synth-pop', 'disco']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  ''
                                            'date'  '2007'
                                        'comments'  ''
                                           'genre'  'electronic-we-electro'
                                             'bpm'  '128.008'
                                             'key'  '12A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM::eng'                                         '[uF]'
'COMM:ID3v1 Comment:XXX'                            '[uF]'
'PRIV:AverageLevel:{+\x00\x00'                      PRIV(owner='AverageLevel', data=b'{+\x00\x00')
'PRIV:PeakValue:¡\x7f\x00\x00'                      PRIV(owner='PeakValue', data=b'\xa1\x7f\x00\x00')
'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 \x00M\x00i\x00c\x00r\x00o\x00s\x00o\x00f\x00t\x00\x00\x00'  PRIV(owner='WM/Provider', data=b'A\x00M\x00G\x00 \x00&\x00 \x00M\x00i\x00c\x00r\x00o\x00s\x00o\x00f\x00t\x00\x00\x00')
'PRIV:WM/UniqueFileIdentifier:A\x00M\x00G\x00a\x00_\x00i\x00d\x00=\x00R\x00 \x00 \x001\x000\x004\x002\x001\x000\x003\x00;\x00\x00\x00'  PRIV(owner='WM/UniqueFileIdentifier', data=b'A\x00M\x00G\x00a\x00_\x00i\x00d\x00=\x00R\x00 \x00 \x001\x000\x004\x002\x001\x000\x003\x00;\x00\x00\x00')
'PRIV:WM/WMCollectionGroupID:èÔ\x9fâEÁÈG\x99\x88µá\xad©9Ä'  PRIV(owner='WM/WMCollectionGroupID', data=b'\xe8\xd4\x9f\xe2E\xc1\xc8G\x99\x88\xb5\xe1\xad\xa99\xc4')
'PRIV:WM/WMCollectionID:èÔ\x9fâEÁÈG\x99\x88µá\xad©9Ä'  PRIV(owner='WM/WMCollectionID', data=b'\xe8\xd4\x9f\xe2E\xc1\xc8G\x99\x88\xb5\xe1\xad\xa99\xc4')
'PRIV:WM/WMContentID:\x90\x80yzÊ\x19KI¬Þ