======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '175'
                                          'artist'  'Al Terry & His Gold Star Band'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'H-A-D-A-C-O-L (Feature, c.1949)'
                                           'quals'  ("['Q-OLDST-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-1', "
 "'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-2']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'set-pl-spelling'
                                             'bpm'  '84.596'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '84.596'
'TCON' (Content type, a.k.a. Genre)                 'set-pl-spelling'
'TIT2' (Title/songname/content description)         'H-A-D-A-C-O-L (Feature, c.1949)'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Al Terry & His Gold Star Band'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.34 dB'
'TXXX:replaygain_track_peak'                        '0.485027'

========================== row from database ==========================
                                              'id'  761425
                                            'path'  /data/Music/Bulk/0playlists/0novelty themes/spelling/Al Terry & His Gold Star Band - H-A-D-A-C-O-L (Feature, c.1949).mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  175
                                           'genre'  set-pl-spelling
                                        'filesize'  4210334
                                           'mtime'  1620356283
                                   'redo_metaread'  0
                                        'rest_str'   0playlists 0novelty themes spelling set pl spelling
                                      'tag_artist'  Al Terry & His Gold Star Band
                                     'tag_release'  None
                                       'tag_title'  H-A-D-A-C-O-L (Feature, c.1949)
                                             'bpm'  84.596
                                    'search_title'  '1949':12 'a':2,4 'c':5,11 'c1949':13 'd':3 'feature':9,10 'h':1 'hadacol':8 'l':7 'o':6
                                   'search_artist'  'al':1 'band':6 'gold':4 'his':3 'star':5 'terry':2
                                  'search_release'  
                                     'search_rest'  '0novelty':2 '0playlists':1 'pl':6 'set':5 'spelling':4 'themes':3
                                    'search_combo'  '0novelty':21 '0playlists':20 '1949':12A 'a':2A,4A 'al':14B 'band':19B 'c':5A,11A 'c1949':13A 'd':3A 'feature':9A,10A 'gold':17B 'h':1A 'hadacol':8A 'his':16B 'l':7A 'o':6A 'pl':25 'set':24 'spelling':23 'star':18B 'terry':15B 'themes':22
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-1', 'q-other-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620356282.903463  (2021-05-07 04:58:02)
                             'size'  4210334