======================== unified (from filesystem) ========================
                                         'bitrate'  '241.323'
                                        'duration'  '231'
                                          'artist'  'The Byrds'
                                     'text_people'  ''
                                         'release'  "The Byrds' Greatest Hits"
                                           'title'  'Chimes Of Freedom'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-2', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['folk', 'rock', 'psychedelic', '60s', 'classic rock']"
                                     'discogstags'  "['rock', 'folk rock', 'rock & roll', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '6'
                                      'tracktotal'  ''
                                            'date'  '1990'
                                        'comments'  ''
                                           'genre'  'rock-cppex-classic'
                                             'bpm'  '125.860'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'PRIV:AverageLevel:À\x11\x00\x00'                   PRIV(owner='AverageLevel', data=b'\xc0\x11\x00\x00')
'PRIV:PeakValue:?r\x00\x00'                         PRIV(owner='PeakValue', data=b'?r\x00\x00')
'TALB' (Album/Movie/Show title)                     "The Byrds' Greatest Hits"
'TBPM' (BPM (beats per minute))                     '125.860'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex-classic'
'TDRC' (Recording time)                             '1990'
'TENC' (Encoded by)                                 'Exact Audio Copy   (Secure mode)'
'TIT2' (Title/songname/content description)         'Chimes Of Freedom'
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'The Byrds'
'TRCK' (Track number/Position in set)               '6'
'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', 'folk rock', 'rock & roll', 'classic rock']
'TXXX:lastfmtags'                                   ['folk', 'rock', 'psychedelic', '60s', 'classic rock']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.39 dB'
'TXXX:replaygain_track_peak'                        '0.530730'

========================== row from database ==========================
                                              'id'  1332321
                                            'path'  /data/Music/Bulk/00poprockelectronic/The Byrds/The Byrds_/Greatest Hits/06 - Chimes Of Freedom.mp3
                                         'working'  None
                                         'bitrate'  241
                                    'duration_sec'  231
                                           'genre'  rock-cppex-classic
                                        'filesize'  7002889
                                           'mtime'  1636039336
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Byrds_ 06 rock cppex classic
                                      'tag_artist'  The Byrds
                                     'tag_release'  The Byrds' Greatest Hits
                                       'tag_title'  Chimes Of Freedom
                                             'bpm'  125.86
                                    'search_title'  'chimes':1 'freedom':3 'of':2
                                   'search_artist'  'byrds':2 'the':1
                                  'search_release'  'byrds':2,3 'greatest':4 'hits':5 'the':1
                                     'search_rest'  '00poprockelectronic':1 'byrds':2 'classic':5 'cppex':4 'rock':3
                                    'search_combo'  '00poprockelectronic':11 'byrds':5B,7C,8C,12 'chimes':1A 'classic':15 'cppex':14 'freedom':3A 'greatest':9C 'hits':10C 'of':2A 'rock':13 'the':4B,6C
                                    'tag_tracknum'  6
                                      'num_images'  0
                                             'key'  9B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', '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-2', 'q-syn-2', 'q-chart-4', 'q-other-2', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['folk', 'rock', 'psychedelic', '60s', 'classic rock']
                                        'tag_date'  1990
                                     'discogstags'  ['rock', 'folk rock', 'rock & roll', 'classic rock']

============================== file details ==============================
                                           'mtime'  1636039335.6725798  (2021-11-04 16:22:15)
                             'size'  7002889