======================== unified (from filesystem) ========================
                                         'bitrate'  '220.094'
                                        'duration'  '237'
                                          'artist'  'Lazyboy'
                                     'text_people'  ''
                                         'release'  'Lazyboy TV'
                                           'title'  'Facts of Life'
                                           'quals'  "['q-bass-3', 'q-drums-4', 'q-other-1', 'q-piano-1', 'q-vocals-3']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  ''
                                            'date'  '2004'
                                        'comments'  ''
                                           'genre'  'Pop'
                                             'bpm'  '104.0'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'COMM::XXX'                                         "SMO rockin' 2004!"
'POPM:'                                             POPM(email='', rating=204)
'TALB' (Album/Movie/Show title)                     'Lazyboy TV'
'TBPM' (BPM (beats per minute))                     '104.0'
'TCON' (Content type, a.k.a. Genre)                 'Pop'
'TDOR' (Original release time)                      '2004'
'TDRC' (Recording time)                             '2004'
'TIT2' (Title/songname/content description)         'Facts of Life'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Lazyboy'
'TRCK' (Track number/Position in set)               '2'
'TXXX:MusicBrainz Album Id'                         '80121b96-3a2d-4080-af6b-2768e982fa7e'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        'e47fbf55-6aeb-4f6c-81f7-6dfdc7452539'
'TXXX:MusicBrainz TRM Id'                           '066cfbd2-4011-47cb-88b5-9964e28b5641'
'TXXX:q-bass'                                       '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '3'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'63dd2293-b83a-4200-8843-3dc42a3c6db5')

========================== row from database ==========================
                                              'id'  1538675
                                            'path'  /data/Music/Other/PrevSet/[9amusing]/Lazyboy/Facts of Life.mp3
                                         'working'  None
                                         'bitrate'  220
                                    'duration_sec'  237
                                           'genre'  Pop
                                        'filesize'  6529230
                                           'mtime'  1662800544
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [9amusing] Pop
                                      'tag_artist'  Lazyboy
                                     'tag_release'  Lazyboy TV
                                       'tag_title'  Facts of Life
                                             'bpm'  104.0
                                    'search_title'  'facts':1 'life':3 'of':2
                                   'search_artist'  'lazyboy':1
                                  'search_release'  'lazyboy':1 'tv':2
                                     'search_rest'  '9amusing':2,3 'pop':4 'prev':5 'prevset':1 'set':6
                                    'search_combo'  '9amusing':8,9 'facts':1A 'lazyboy':4B,5C 'life':3A 'of':2A 'pop':10 'prev':11 'prevset':7 'set':12 'tv':6C
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['q-bass-3', 'q-drums-4', 'q-other-1', 'q-piano-1', 'q-vocals-3']
                                      'lastfmtags'  []
                                        'tag_date'  2004
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800543.9570544  (2022-09-10 11:02:23)
                             'size'  6529230