======================== unified (from filesystem) ========================
                                         'bitrate'  '160.004'
                                        'duration'  '257'
                                          'artist'  'Lamb'
                                     'text_people'  ''
                                         'release'  'Best Kept Secrets'
                                           'title'  'Gabriel'
                                           'quals'  "['q-bass-3', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '11'
                                      'tracktotal'  ''
                                            'date'  '2004'
                                        'comments'  ''
                                           'genre'  ''
                                             'bpm'  '112.2'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:eng'                            'ogg had 160 kbps 44100 Hz'
'TALB' (Album/Movie/Show title)                     'Best Kept Secrets'
'TBPM' (BPM (beats per minute))                     '112.2'
'TDRC' (Recording time)                             '2004'
'TIT2' (Title/songname/content description)         'Gabriel'
'TKEY' (Initial key)                                '10B'
'TPE1' (Lead performer(s)/Soloist(s))               'Lamb'
'TRCK' (Track number/Position in set)               '11'
'TXXX:q-bass'                                       '3'
'TXXX:q-drums'                                      '3'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '3'

========================== row from database ==========================
                                              'id'  1538740
                                            'path'  /data/Music/Other/PrevSet/[0yay1]/Lamb/Gabriel.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  257
                                           'genre'  
                                        'filesize'  5167445
                                           'mtime'  1662800309
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [0yay1]
                                      'tag_artist'  Lamb
                                     'tag_release'  Best Kept Secrets
                                       'tag_title'  Gabriel
                                             'bpm'  112.2
                                    'search_title'  'gabriel':1
                                   'search_artist'  'lamb':1
                                  'search_release'  'best':1 'kept':2 'secrets':3
                                     'search_rest'  '0yay1':2,3 'prev':4 'prevset':1 'set':5
                                    'search_combo'  '0yay1':7,8 'best':3C 'gabriel':1A 'kept':4C 'lamb':2B 'prev':9 'prevset':6 'secrets':5C 'set':10
                                    'tag_tracknum'  11
                                      'num_images'  0
                                             'key'  10B
                                           'quals'  ['q-bass-3', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3']
                                      'lastfmtags'  []
                                        'tag_date'  2004
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800309.2766294  (2022-09-10 10:58:29)
                             'size'  5167445