======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '183'
                                          'artist'  'Freezepop'
                                     'text_people'  ''
                                         'release'  'Freezepop Forever'
                                           'title'  'Summer Boy'
                                           'quals'  "['q-bass-4', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '11'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  ''
                                             'bpm'  '120.0'
                                             'key'  '8B'
                                        'acoustid'  ''
rest: ''

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

'POPM:'                                             POPM(email='', rating=204)
'TALB' (Album/Movie/Show title)                     'Freezepop Forever'
'TBPM' (BPM (beats per minute))                     '120.0'
'TIT2' (Title/songname/content description)         'Summer Boy'
'TKEY' (Initial key)                                '8B'
'TPE1' (Lead performer(s)/Soloist(s))               'Freezepop'
'TRCK' (Track number/Position in set)               '11'
'TXXX:MusicBrainz Album Id'                         'ec9cdca2-ab91-4af0-a281-794f7ee6419b'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        'bb1f91d2-1b54-4ee5-b55a-626492a5904f'
'TXXX:MusicBrainz TRM Id'                           '816a1763-4e0f-4ead-b932-7e4434d17f64'
'TXXX:q-bass'                                       '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '3'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'abab77de-418e-42fd-aab2-87b91ff15739')

========================== row from database ==========================
                                              'id'  1538460
                                            'path'  /data/Music/Other/PrevSet/[2electro1-softer]/Freezepop/Summer Boy.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  183
                                           'genre'  
                                        'filesize'  2937006
                                           'mtime'  1662800325
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [2electro1 softer]
                                      'tag_artist'  Freezepop
                                     'tag_release'  Freezepop Forever
                                       'tag_title'  Summer Boy
                                             'bpm'  120.0
                                    'search_title'  'boy':2 'summer':1
                                   'search_artist'  'freezepop':1
                                  'search_release'  'forever':2 'freezepop':1
                                     'search_rest'  '2electro1':2,3 'prev':6 'prevset':1 'set':7 'softer':4,5
                                    'search_combo'  '2electro1':7,8 'boy':2A 'forever':5C 'freezepop':3B,4C 'prev':11 'prevset':6 'set':12 'softer':9,10 'summer':1A
                                    'tag_tracknum'  11
                                      'num_images'  0
                                             'key'  8B
                                           'quals'  ['q-bass-4', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800324.7721293  (2022-09-10 10:58:44)
                             'size'  2937006