======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '132'
                                          'artist'  'John Peel Peelenium'
                                     'text_people'  ''
                                         'release'  '1950-1959/1951'
                                           'title'  'Rosemary-Fats Domino'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  ''
                                            'date'  '1951'
                                        'comments'  ''
                                           'genre'  'prerock-vocal'
                                             'bpm'  '121.409'
                                             'key'  '4B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     '1950-1959/1951'
'TBPM' (BPM (beats per minute))                     '121.409'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1951'
'TIT2' (Title/songname/content description)         'Rosemary-Fats Domino'
'TKEY' (Initial key)                                '4B'
'TPE1' (Lead performer(s)/Soloist(s))               'John Peel Peelenium'
'TRCK' (Track number/Position in set)               '3'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.59 dB'
'TXXX:replaygain_track_peak'                        '0.546421'

========================== row from database ==========================
                                              'id'  1426600
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1951/3 Fats Domino - Rosemary.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  132
                                           'genre'  prerock-vocal
                                        'filesize'  2129634
                                           'mtime'  1621853302
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 3 prerock vocal
                                      'tag_artist'  John Peel Peelenium
                                     'tag_release'  1950-1959/1951
                                       'tag_title'  Rosemary-Fats Domino
                                             'bpm'  121.409
                                    'search_title'  'domino':4 'fats':2 'rosemary':1 'rosemaryfats':3
                                   'search_artist'  'john':1 'peel':2 'peelenium':3
                                  'search_release'  '1950':1 '195019591951':4 '1951':3 '1959':2
                                     'search_rest'  '00oldiepop':5 '3':6 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':7 'vocal':8
                                    'search_combo'  '00oldiepop':16 '1950':8C '195019591951':11C '1951':10C '1959':9C '3':17 'country':15 'domino':4A 'exotica':13 'fats':2A 'jazz':12 'john':5B 'oldies':14 'peel':6B 'peelenium':7B 'prerock':18 'rosemary':1A 'rosemaryfats':3A 'vocal':19
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  4B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1951
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621853302.1596897  (2021-05-24 12:48:22)
                             'size'  2129634