======================== unified (from filesystem) ========================
                                         'bitrate'  '155.482'
                                        'duration'  '216'
                                          'artist'  'Riverside'
                                     'text_people'  ''
                                         'release'  'Rapid Eye Movement'
                                           'title'  'Rainbow Box'
                                           'quals'  ("['Q-LOCALNESS-1', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-4', 'q-play-3', "
 "'q-chart-2', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  ("['melancholic', 'progressive', 'progressive metal', 'rock', 'polish', "
 "'progressive rock']")
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  ''
                                            'date'  '2007'
                                        'comments'  ''
                                           'genre'  'eid-metal-progressive'
                                             'bpm'  '126.1'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'PRIV:AverageLevel:{\x1f\x00\x00'                   PRIV(owner='AverageLevel', data=b'{\x1f\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'          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 \x001\x002\x000\x008\x001\x007\x005\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x006\x007\x004\x008\x005\x009\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x001\x002\x002\x002\x000\x005\x007\x000\x00\x00\x00'  PRIV(owner='WM/UniqueFileIdentifier', data=b'A\x00M\x00G\x00a\x00_\x00i\x00d\x00=\x00R\x00 \x00 \x001\x002\x000\x008\x001\x007\x005\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x006\x007\x004\x008\x005\x009\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x001\x002\x002\x002\x000\x005\x007\x000\x00\x00\x00')
'PRIV:WM/WMCollectionGroupID:<^\x11\'Ò"=J\x94R\x98¯÷Å"\x80'  PRIV(owner='WM/WMCollectionGroupID', data=b'<^\x11\'\xd2"=J\x94R\x98\xaf\xf7\xc5"\x80')
'PRIV:WM/WMCollectionID:<^\x11\'Ò"=J\x94R\x98¯÷Å"\x80'  PRIV(owner='WM/WMCollectionID', data=b'<^\x11\'\xd2"=J\x94R\x98\xaf\xf7\xc5"\x80')
'PRIV:WM/WMContentID:IÝ\nq¶ØGE\x90\x03á§\x81ý\x1aS'  PRIV(owner='WM/WMContentID', data=b'I\xdd\nq\xb6\xd8GE\x90\x03\xe1\xa7\x81\xfd\x1aS')
'TALB' (Album/Movie/Show title)                     'Rapid Eye Movement'
'TBPM' (BPM (beats per minute))                     '126.1'
'TCON' (Content type, a.k.a. Genre)                 'eid-metal-progressive'
'TDRC' (Recording time)                             '2007'
'TENC' (Encoded by)                                 'iTunes v7.3.2, QuickTime 7.2'
'TIT2' (Title/songname/content description)         'Rainbow Box'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Riverside'
'TPE2' (Band/orchestra/accompaniment)               'Riverside'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Inside Out'
'TRCK' (Track number/Position in set)               '2'
'TXXX:Compilation'                                  '0'
'TXXX:Q-HAP'                                        '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  'rock'
'TXXX:iTunNORM'                                     (' 000019F5 00001B97 00008200 00008C1A 0000DEA2 0001D133 0000881B 000093BE '
 '0001A42A 000270C0')
'TXXX:iTunSMPB'                                     (' 00000000 00000840 00000040 00000000009E8B80 00000000 00000000 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'TXXX:lastfmtags'                                   ['melancholic',
 'progressive',
 'progressive metal',
 'rock',
 'polish',
 'progressive rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '4'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.88 dB'
'TXXX:replaygain_track_peak'                        '0.414342'

========================== row from database ==========================
                                              'id'  1399160
                                            'path'  /data/Music/Bulk/00dwimp/00metal/Riverside/Rapid Eye Movement/02 Rainbow Box.mp3
                                         'working'  None
                                         'bitrate'  155
                                    'duration_sec'  216
                                           'genre'  eid-metal-progressive
                                        'filesize'  4223000
                                           'mtime'  1620310888
                                   'redo_metaread'  0
                                        'rest_str'   00dwimp 00metal 02 eid metal progressive
                                      'tag_artist'  Riverside
                                     'tag_release'  Rapid Eye Movement
                                       'tag_title'  Rainbow Box
                                             'bpm'  126.1
                                    'search_title'  'box':2 'rainbow':1
                                   'search_artist'  'riverside':1
                                  'search_release'  'eye':2 'movement':3 'rapid':1
                                     'search_rest'  '00dwimp':1 '00metal':2 'eid':3 'metal':4 'progressive':5
                                    'search_combo'  '00dwimp':7 '00metal':8 'box':2A 'eid':9 'eye':5C 'metal':10 'movement':6C 'progressive':11 'rainbow':1A 'rapid':4C 'riverside':3B
                                    'tag_tracknum'  2
                                      'num_images'  1
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-1', 'q-bass-3', 'q-grit-4']
                                      'lastfmtags'  ['melancholic', 'progressive', 'progressive metal', 'rock', 'polish', 'progressive rock']
                                        'tag_date'  2007
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1620310888.0750434  (2021-05-06 16:21:28)
                             'size'  4223000