======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '280'
                                          'artist'  'Beady Belle'
                                     'text_people'  ''
                                         'release'  'Home'
                                           'title'  'Game'
                                           'quals'  "['q-bass-4', 'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-3']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '8'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  ''
                                             'bpm'  '90.0'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'POPM:'                                             POPM(email='', rating=204)
'TALB' (Album/Movie/Show title)                     'Home'
'TBPM' (BPM (beats per minute))                     '90.0'
'TIT2' (Title/songname/content description)         'Game'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Beady Belle'
'TRCK' (Track number/Position in set)               '8'
'TSOP' (Performer sort order)                       'Beady Belle'
'TXXX:MusicBrainz Album Id'                         '6353e8ec-4c90-45db-8fd7-801fb968ece4'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Artist Id'                        'ff30cc46-5d98-4708-9c96-a217a7b1e0ff'
'TXXX:q-bass'                                       '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '3'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'326fc13b-75f7-4376-80a7-7349253772b1')

========================== row from database ==========================
                                              'id'  1538328
                                            'path'  /data/Music/Other/PrevSet/[6calmer]/Beady Belle/Game.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  280
                                           'genre'  
                                        'filesize'  6731859
                                           'mtime'  1662800376
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [6calmer]
                                      'tag_artist'  Beady Belle
                                     'tag_release'  Home
                                       'tag_title'  Game
                                             'bpm'  90.0
                                    'search_title'  'game':1
                                   'search_artist'  'beady':1 'belle':2
                                  'search_release'  'home':1
                                     'search_rest'  '6calmer':2,3 'prev':4 'prevset':1 'set':5
                                    'search_combo'  '6calmer':6,7 'beady':2B 'belle':3B 'game':1A 'home':4C 'prev':8 'prevset':5 'set':9
                                    'tag_tracknum'  8
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['q-bass-4', 'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-3']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800376.0104756  (2022-09-10 10:59:36)
                             'size'  6731859