======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '163'
                                          'artist'  'Bing Crosby & Andrews Sisters'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  '131 Victory Polka - Bing Crosby & Andrews Sisters (13-11-1943)'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', "
 "'q-play-2', 'Q-JZFKS-2', 'Q-OLDST-1', 'q-chart-2', 'q-drums-1', 'q-other-2', "
 "'q-piano-1', 'q-vocals-4', 'Q-HHRNBTT-1', 'q-mixbeat-1', 'Q-LOCALNESS-1']")
                                      'lastfmtags'  "['jazz', 'swing', '40s', '30s', 'female vocalists']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '131'
                                      'tracktotal'  ''
                                            'date'  '1943'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '114.414'
                                             'key'  '4A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '114.414'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1943'
'TIT2' (Title/songname/content description)         '131 Victory Polka - Bing Crosby & Andrews Sisters (13-11-1943)'
'TKEY' (Initial key)                                '4A'
'TPE1' (Lead performer(s)/Soloist(s))               'Bing Crosby & Andrews Sisters'
'TRCK' (Track number/Position in set)               '131'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['jazz', 'swing', '40s', '30s', 'female vocalists']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '-0.13 dB'
'TXXX:replaygain_track_peak'                        '0.442059'

========================== row from database ==========================
                                              'id'  1455178
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1943/131 Victory Polka - Bing Crosby & Andrews Sisters (13-11-1943).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  163
                                           'genre'  prerock-swing
                                        'filesize'  2617283
                                           'mtime'  1620561848
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop prerock swing
                                      'tag_artist'  Bing Crosby & Andrews Sisters
                                     'tag_release'  None
                                       'tag_title'  131 Victory Polka - Bing Crosby & Andrews Sisters (13-11-1943)
                                             'bpm'  114.414
                                    'search_title'  '11':9 '13':8 '131':1 '13111943':11 '1943':10 'andrews':6 'bing':4 'crosby':5 'polka':3 'sisters':7 'victory':2
                                   'search_artist'  'andrews':3 'bing':1 'crosby':2 'sisters':4
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':6 'swing':7
                                    'search_combo'  '00oldiepop':20 '11':9A '13':8A '131':1A '13111943':11A '1943':10A 'andrews':6A,14B 'bing':4A,12B 'country':19 'crosby':5A,13B 'exotica':17 'jazz':16 'oldies':18 'polka':3A 'prerock':21 'sisters':7A,15B 'swing':22 'victory':2A
                                    'tag_tracknum'  131
                                      'num_images'  0
                                             'key'  4A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['jazz', 'swing', '40s', '30s', 'female vocalists']
                                        'tag_date'  1943
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561847.579877  (2021-05-09 14:04:07)
                             'size'  2617283