======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '221'
                                          'artist'  'Led Zeppelin'
                                     'text_people'  'John Bonham, John Paul Jones, Jimmy Page & Robert Plant'
                                         'release'  'Led Zeppelin IV'
                                           'title'  'Rock & Roll'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-3', 'q-play-3', "
 "'q-chart-4', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['hard rock', 'rock', 'progressive rock', '70s', 'classic rock']"
                                     'discogstags'  "['rock', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  ''
                                            'date'  '1971'
                                        'comments'  ''
                                           'genre'  'rock-cppex-progressive'
                                             'bpm'  '113.9'
                                             'key'  '11B'
                                        'acoustid'  ''
rest: ''

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

'PRIV:AverageLevel:ó\x13\x00\x00'                   PRIV(owner='AverageLevel', data=b'\xf3\x13\x00\x00')
'PRIV:PeakValue:þ\x7f\x00\x00'                      PRIV(owner='PeakValue', data=b'\xfe\x7f\x00\x00')
'TALB' (Album/Movie/Show title)                     'Led Zeppelin IV'
'TBPM' (BPM (beats per minute))                     '113.9'
'TCOM' (Composer)                                   'John Bonham, John Paul Jones, Jimmy Page & Robert Plant'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex-progressive'
'TDRC' (Recording time)                             '1971'
'TIT2' (Title/songname/content description)         'Rock & Roll'
'TKEY' (Initial key)                                '11B'
'TLEN' (Length)                                     '221100'
'TPE1' (Lead performer(s)/Soloist(s))               'Led Zeppelin'
'TRCK' (Track number/Position in set)               '2'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['rock', 'classic rock']
'TXXX:lastfmtags'                                   ['hard rock', 'rock', 'progressive rock', '70s', 'classic rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '3'
'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'                        '-5.05 dB'
'TXXX:replaygain_track_peak'                        '1.020021'

========================== row from database ==========================
                                              'id'  1416646
                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/Led Zeppelin/Led Zeppelin IV/Led Zeppelin - (1971) Led Zeppelin IV - 02 - Rock and Roll.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  221
                                           'genre'  rock-cppex-progressive
                                        'filesize'  3543014
                                           'mtime'  1620736225
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy (1971) 02 and rock cppex progressive
                                      'tag_artist'  Led Zeppelin
                                     'tag_release'  Led Zeppelin IV
                                       'tag_title'  Rock & Roll
                                             'bpm'  113.9
                                    'search_title'  'rock':1 'roll':2
                                   'search_artist'  'led':1 'zeppelin':2
                                  'search_release'  'iv':3 'led':1 'zeppelin':2
                                     'search_rest'  '1971':2,3 'and':4 'classicprogpsy':1 'cppex':6 'progressive':7 'rock':5
                                    'search_combo'  '1971':9,10 'and':11 'classicprogpsy':8 'cppex':13 'iv':7C 'led':3B,5C 'progressive':14 'rock':1A,12 'roll':2A 'zeppelin':4B,6C
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  11B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-2', '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-4', 'q-grit-3']
                                      'lastfmtags'  ['hard rock', 'rock', 'progressive rock', '70s', 'classic rock']
                                        'tag_date'  1971
                                     'discogstags'  ['rock', 'classic rock']

============================== file details ==============================
                                           'mtime'  1620736225.1026328  (2021-05-11 14:30:25)
                             'size'  3543014