======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '118'
                                          'artist'  'Harry and the Potters'
                                     'text_people'  ''
                                         'release'  '[non-album tracks]'
                                           'title'  'The Wrath of Hermione'
                                           'quals'  "['q-bass-4', 'q-drums-3', 'q-other-1', 'q-piano-1', 'q-vocals-4']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  ''
                                             'bpm'  '133.0'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     '[non-album tracks]'
'TBPM' (BPM (beats per minute))                     '133.0'
'TIT2' (Title/songname/content description)         'The Wrath of Hermione'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Harry and the Potters'
'TRCK' (Track number/Position in set)               '1'
'TXXX:MusicBrainz Album Id'                         '20a09bd3-a2df-4c39-a083-5d266a5e0269'
'TXXX:MusicBrainz Artist Id'                        'e467bdd6-d977-473c-b721-7cc2785933bc'
'TXXX:MusicBrainz TRM Id'                           '077d461b-c4bf-4a32-90ba-fa333e36e389'
'TXXX:q-bass'                                       '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '4'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'e97401c2-ef2e-4edb-9146-290311e2d385')

========================== row from database ==========================
                                              'id'  1538264
                                            'path'  /data/Music/Other/PrevSet/[8ohdear]/Harry and the Potters/The Wrath of Hermione.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  118
                                           'genre'  
                                        'filesize'  2852657
                                           'mtime'  1662800415
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [8ohdear]
                                      'tag_artist'  Harry and the Potters
                                     'tag_release'  [non-album tracks]
                                       'tag_title'  The Wrath of Hermione
                                             'bpm'  133.0
                                    'search_title'  'hermione':4 'of':3 'the':1 'wrath':2
                                   'search_artist'  'and':2 'harry':1 'potters':4 'the':3
                                  'search_release'  'album':2 'non':1 'nonalbum':3 'tracks':4,5
                                     'search_rest'  '8ohdear':2,3 'prev':4 'prevset':1 'set':5
                                    'search_combo'  '8ohdear':15,16 'album':10C 'and':6B 'harry':5B 'hermione':4A 'non':9C 'nonalbum':11C 'of':3A 'potters':8B 'prev':17 'prevset':14 'set':18 'the':1A,7B 'tracks':12C,13C 'wrath':2A
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['q-bass-4', 'q-drums-3', 'q-other-1', 'q-piano-1', 'q-vocals-4']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800415.0852144  (2022-09-10 11:00:15)
                             'size'  2852657