======================== unified (from filesystem) ========================
                                         'bitrate'  '112.0'
                                        'duration'  '194'
                                          'artist'  'Rina Ketty'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "Une Branche D'aubépine"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-HHRNBTT-1', 'Q-LOCALNESS-3', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['female vocalists', 'chanson', '30s', 'french']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1935'
                                        'comments'  ''
                                           'genre'  'loc-eur-france'
                                             'bpm'  '142.9'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '142.9'
'TCON' (Content type, a.k.a. Genre)                 'loc-eur-france'
'TDRC' (Recording time)                             '1935'
'TIT2' (Title/songname/content description)         "Une Branche D'aubépine"
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'Rina Ketty'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['female vocalists', 'chanson', '30s', 'french']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'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'                        '+1.38 dB'
'TXXX:replaygain_track_peak'                        '0.561576'

========================== row from database ==========================
                                              'id'  1508841
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Rina Ketty/Rina Ketty - Une branche d_aubépine.mp3
                                         'working'  None
                                         'bitrate'  112
                                    'duration_sec'  194
                                           'genre'  loc-eur-france
                                        'filesize'  2718312
                                           'mtime'  1620533301
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm branche d_aubépine loc eur france
                                      'tag_artist'  Rina Ketty
                                     'tag_release'  None
                                       'tag_title'  Une Branche D'aubépine
                                             'bpm'  142.9
                                    'search_title'  'aubepine':4,7 'branche':2 'd':3,6 'daubepine':5,8 'une':1
                                   'search_artist'  'ketty':2 'rina':1
                                  'search_release'  
                                     'search_rest'  'aubepine':3,5 'branche':1 'd':2,4 'eur':7 'france':8 'loc':6
                                    'search_combo'  'aubepine':4A,7A,13,15 'branche':2A,11 'd':3A,6A,12,14 'daubepine':5A,8A 'eur':17 'france':18 'ketty':10B 'loc':16 'rina':9B 'une':1A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  9B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['female vocalists', 'chanson', '30s', 'french']
                                        'tag_date'  1935
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620533300.900205  (2021-05-09 06:08:20)
                             'size'  2718312