======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '197'
                                          'artist'  'Anny Gould'
                                     'text_people'  ''
                                         'release'  'Decca M 32533'
                                           'title'  'La Seine'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-3', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['france', 'all', 'singer', 'sometimes jazzy', 'french']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1949'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '136.276'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Decca M 32533'
'TBPM' (BPM (beats per minute))                     '136.276'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1949'
'TIT2' (Title/songname/content description)         'La Seine'
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'Anny Gould'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['france', 'all', 'singer', 'sometimes jazzy', 'french']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'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'                        '+1.91 dB'
'TXXX:replaygain_track_peak'                        '0.643648'

========================== row from database ==========================
                                              'id'  1439977
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1949/Anny Gould - La Seine 1949.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  197
                                           'genre'  prerock-unsorted
                                        'filesize'  3948338
                                           'mtime'  1621627647
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1949 1949 prerock unsorted
                                      'tag_artist'  Anny Gould
                                     'tag_release'  Decca M 32533
                                       'tag_title'  La Seine
                                             'bpm'  136.276
                                    'search_title'  'la':1 'seine':2
                                   'search_artist'  'anny':1 'gould':2
                                  'search_release'  '32533':3 'decca':1 'm':2
                                     'search_rest'  '00oldiepop':5 '1949':6 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':7 'unsorted':8
                                    'search_combo'  '00oldiepop':12 '1949':13 '32533':7C 'anny':3B 'country':11 'decca':5C 'exotica':9 'gould':4B 'jazz':8 'la':1A 'm':6C 'oldies':10 'prerock':14 'seine':2A 'unsorted':15
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-2', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['france', 'all', 'singer', 'sometimes jazzy', 'french']
                                        'tag_date'  1949
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621627647.4178383  (2021-05-21 22:07:27)
                             'size'  3948338