======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '221'
                                          'artist'  'Heart'
                                     'text_people'  'A. Alton - B. Allen - J. Vallance'
                                         'release'  'The Essential Heart'
                                           'title'  'What About Love?'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['hard rock', '80s', 'rock', 'female vocalists', 'classic rock']"
                                     'discogstags'  "['rock', 'aor', 'classic rock', 'hard rock', 'soft rock', 'arena rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  ''
                                            'date'  '2002'
                                        'comments'  ''
                                           'genre'  'rock-cppex-classic'
                                             'bpm'  '143.213'
                                             'key'  '8B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:XXX'                            ' 00001FE2 00001B80 0000F9EA'
'COMM:iTunNORM:eng'                                 (' 00001FE2 00001B80 0000F9EA 0000D802 0002EE1A 00026424 00009069 00008D01 '
 '000052F5 000274E0')
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 00000B10 00000000009514E0 00000000 00000000 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'COMM:iTunes_CDDB_IDs:eng'                          '19+718CF892092277E9A33EF3BE89B0B402+3306305'
'TALB' (Album/Movie/Show title)                     'The Essential Heart'
'TBPM' (BPM (beats per minute))                     '143.213'
'TCOM' (Composer)                                   'A. Alton - B. Allen - J. Vallance'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex-classic'
'TDRC' (Recording time)                             '2002'
'TENC' (Encoded by)                                 'iTunes v6.0.4.2'
'TIT2' (Title/songname/content description)         'What About Love?'
'TKEY' (Initial key)                                '8B'
'TPE1' (Lead performer(s)/Soloist(s))               'Heart'
'TPE2' (Band/orchestra/accompaniment)               'Heart'
'TPOS' (Part of a set)                              '2'
'TRCK' (Track number/Position in set)               '1'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['rock', 'aor', 'classic rock', 'hard rock', 'soft rock', 'arena rock']
'TXXX:lastfmtags'                                   ['hard rock', '80s', 'rock', 'female vocalists', 'classic rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.78 dB'
'TXXX:replaygain_track_peak'                        '0.432849'

========================== row from database ==========================
                                              'id'  1304100
                                            'path'  /data/Music/Bulk/00poprockelectronic/Heart/The Essential Heart/Disc 2/1 - What About Love.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  221
                                           'genre'  rock-cppex-classic
                                        'filesize'  5333682
                                           'mtime'  1636039226
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Disc 2 1 rock cppex classic
                                      'tag_artist'  Heart
                                     'tag_release'  The Essential Heart
                                       'tag_title'  What About Love?
                                             'bpm'  143.213
                                    'search_title'  'about':2 'love':3 'what':1
                                   'search_artist'  'heart':1
                                  'search_release'  'essential':2 'heart':3 'the':1
                                     'search_rest'  '00poprockelectronic':1 '1':4 '2':3 'classic':7 'cppex':6 'disc':2 'rock':5
                                    'search_combo'  '00poprockelectronic':8 '1':11 '2':10 'about':2A 'classic':14 'cppex':13 'disc':9 'essential':6C 'heart':4B,7C 'love':3A 'rock':12 'the':5C 'what':1A
                                    'tag_tracknum'  1
                                      'num_images'  1
                                             'key'  8B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['hard rock', '80s', 'rock', 'female vocalists', 'classic rock']
                                        'tag_date'  2002
                                     'discogstags'  ['rock', 'aor', 'classic rock', 'hard rock', 'soft rock', 'arena rock']

============================== file details ==============================
                                           'mtime'  1636039226.0309696  (2021-11-04 16:20:26)
                             'size'  5333682