======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '66'
                                          'artist'  ''
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Mondharp-1-tuba'
                                           'quals'  "['q-bass-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'Volksmuziek'
                                             'bpm'  '127.4'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

'COMM:iTunNORM:eng'                                 (' 000003F8 0000000A 0000240A 00000EBA 00001E34 00002749 00006A9F 00006AC8 '
 '00006397 00006397')
'TBPM' (BPM (beats per minute))                     '127.4'
'TCON' (Content type, a.k.a. Genre)                 'Volksmuziek'
'TENC' (Encoded by)                                 'iTunes v4.7.1.30'
'TIT2' (Title/songname/content description)         'Mondharp-1-tuba'
'TKEY' (Initial key)                                '10B'
'TXXX:q-bass'                                       '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '1'

========================== row from database ==========================
                                              'id'  1538306
                                            'path'  /data/Music/Other/PrevSet/[9amusing]/Mondharp.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  66
                                           'genre'  Volksmuziek
                                        'filesize'  1335763
                                           'mtime'  1662800562
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [9amusing] Volksmuziek
                                      'tag_artist'  None
                                     'tag_release'  None
                                       'tag_title'  Mondharp-1-tuba
                                             'bpm'  127.4
                                    'search_title'  '1':2 'mondharp':1 'mondharp1tuba':4 'tuba':3
                                   'search_artist'  None
                                  'search_release'  
                                     'search_rest'  '9amusing':2,3 'prev':5 'prevset':1 'set':6 'volksmuziek':4
                                    'search_combo'  '1':2A '9amusing':6,7 'mondharp':1A 'mondharp1tuba':4A 'prev':9 'prevset':5 'set':10 'tuba':3A 'volksmuziek':8
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10B
                                           'quals'  ['q-bass-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800562.1924658  (2022-09-10 11:02:42)
                             'size'  1335763