======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '357'
                                          'artist'  'Heart'
                                     'text_people'  'J. Bonham - J. P. Jones - J. Page - R. Plant'
                                         'release'  'The Essential Heart'
                                           'title'  'Rock And Roll (Live)'
                                           '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-2', "
 "'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'  '13'
                                      'tracktotal'  ''
                                            'date'  '2002'
                                        'comments'  ''
                                           'genre'  'rock-cppex-classic'
                                             'bpm'  '116.320'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:XXX'                            ' 00001673 00001B10 0000DD02'
'COMM:iTunNORM:eng'                                 (' 00001673 00001B10 0000DD02 000103CC 00038C5E 000243B1 000089D9 00008AE7 '
 '00046DFA 0004DB78')
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 000009A8 0000000000F0A6C8 00000000 00000000 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'COMM:iTunes_CDDB_IDs:eng'                          '18+38D39831603799E0609BA3B3FF17DD6C+3669851'
'TALB' (Album/Movie/Show title)                     'The Essential Heart'
'TBPM' (BPM (beats per minute))                     '116.320'
'TCOM' (Composer)                                   'J. Bonham - J. P. Jones - J. Page - R. Plant'
'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)         'Rock And Roll (Live)'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Heart'
'TPE2' (Band/orchestra/accompaniment)               'Heart'
'TPOS' (Part of a set)                              '1'
'TRCK' (Track number/Position in set)               '13'
'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'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.67 dB'
'TXXX:replaygain_track_peak'                        '0.406327'

========================== row from database ==========================
                                              'id'  1340947
                                            'path'  /data/Music/Bulk/00poprockelectronic/Heart/The Essential Heart/Disc 1/13 - Rock And Roll (Live).mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  357
                                           'genre'  rock-cppex-classic
                                        'filesize'  8599437
                                           'mtime'  1636039221
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Disc 1 13 rock cppex classic
                                      'tag_artist'  Heart
                                     'tag_release'  The Essential Heart
                                       'tag_title'  Rock And Roll (Live)
                                             'bpm'  116.32
                                    'search_title'  'and':2 'live':4,5 'rock':1 'roll':3
                                   'search_artist'  'heart':1
                                  'search_release'  'essential':2 'heart':3 'the':1
                                     'search_rest'  '00poprockelectronic':1 '1':3 'classic':6 'cppex':5 'disc':2 'rock':4
                                    'search_combo'  '00poprockelectronic':10 '1':12 'and':2A 'classic':15 'cppex':14 'disc':11 'essential':8C 'heart':6B,9C 'live':4A,5A 'rock':1A,13 'roll':3A 'the':7C
                                    'tag_tracknum'  13
                                      'num_images'  1
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', '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'  1636039220.554633  (2021-11-04 16:20:20)
                             'size'  8599437