======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '276'
                                          'artist'  'Susperia'
                                     'text_people'  ''
                                         'release'  'Predominance'
                                           'title'  'Vainglory'
                                           '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-4', 'q-grit-4', 'q-play-3', "
 "'q-chart-2', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  ("['melodic death metal', 'melodic black metal', 'black metal', 'thrash "
 "metal', 'metal']")
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  ''
                                            'date'  '2001'
                                        'comments'  ''
                                           'genre'  'eid-metal-black'
                                             'bpm'  '144.6'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.OTHER (Other) b''
                                     
"PRIV:AverageLevel:J'\x00\x00"                      PRIV(owner='AverageLevel', data=b"J'\x00\x00")
'PRIV:PeakValue:ÿ\x7f\x00\x00'                      PRIV(owner='PeakValue', data=b'\xff\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')
'TALB' (Album/Movie/Show title)                     'Predominance'
'TBPM' (BPM (beats per minute))                     '144.6'
'TCON' (Content type, a.k.a. Genre)                 'eid-metal-black'
'TDRC' (Recording time)                             '2001'
'TIT2' (Title/songname/content description)         'Vainglory'
'TKEY' (Initial key)                                '7A'
'TLEN' (Length)                                     '276009'
'TPE1' (Lead performer(s)/Soloist(s))               'Susperia'
'TRCK' (Track number/Position in set)               '2'
'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:lastfmtags'                                   ['melodic death metal',
 'melodic black metal',
 'black metal',
 'thrash metal',
 'metal']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '4'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '4'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-1.85 dB'
'TXXX:replaygain_track_peak'                        '0.417129'

========================== row from database ==========================
                                              'id'  1400019
                                            'path'  /data/Music/Bulk/00dwimp/00metal/Susperia/Predominance/2. Vainglory.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  276
                                           'genre'  eid-metal-black
                                        'filesize'  4418205
                                           'mtime'  1620301798
                                   'redo_metaread'  0
                                        'rest_str'   00dwimp 00metal 2. eid metal black
                                      'tag_artist'  Susperia
                                     'tag_release'  Predominance
                                       'tag_title'  Vainglory
                                             'bpm'  144.6
                                    'search_title'  'vainglory':1
                                   'search_artist'  'susperia':1
                                  'search_release'  'predominance':1
                                     'search_rest'  '00dwimp':1 '00metal':2 '2':3,4 'black':7 'eid':5 'metal':6
                                    'search_combo'  '00dwimp':4 '00metal':5 '2':6,7 'black':10 'eid':8 'metal':9 'predominance':3C 'susperia':2B 'vainglory':1A
                                    'tag_tracknum'  2
                                      'num_images'  1
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-4', 'q-drums-4', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-1', 'q-bass-3', 'q-grit-4']
                                      'lastfmtags'  ['melodic death metal', 'melodic black metal', 'black metal', 'thrash metal', 'metal']
                                        'tag_date'  2001
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1620301797.5548368  (2021-05-06 13:49:57)
                             'size'  4418205