======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '198'
                                          'artist'  'Aqua'
                                     'text_people'  ''
                                         'release'  'Aquarium'
                                           'title'  'Barbie Girl'
                                           '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'  '3'
                                      'tracktotal'  ''
                                            'date'  '1997'
                                        'comments'  ''
                                           'genre'  'Europop'
                                             'bpm'  '130.1'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'POPM:'                                             POPM(email='', rating=153)
'PRIV:www.mexp.dk:\x01\x06\x00\x00\x00\x0090-99\x01\x04\x00\x00\x00\x00pop\x01\x07\x00\x00\x00\x00active\x01\t\x00\x00\x00\x00cheerful'  PRIV(owner='www.mexp.dk', data=b'\x01\x06\x00\x00\x00\x0090-99\x01\x04\x00\x00\x00\x00pop\x01\x07\x00\x00\x00\x00active\x01\t\x00\x00\x00\x00cheerful')
'TALB' (Album/Movie/Show title)                     'Aquarium'
'TBPM' (BPM (beats per minute))                     '130.1'
'TCON' (Content type, a.k.a. Genre)                 'Europop'
'TDRC' (Recording time)                             '1997'
'TIT2' (Title/songname/content description)         'Barbie Girl'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Aqua'
'TRCK' (Track number/Position in set)               '3'
'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'3dbcef99-11cd-4a0e-ad3c-e311fa1d11ac\x00')

========================== row from database ==========================
                                              'id'  1538189
                                            'path'  /data/Music/Other/PrevSet/[8ohdear]/Aqua/Barbie Girl.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  198
                                           'genre'  Europop
                                        'filesize'  3170304
                                           'mtime'  1662800393
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [8ohdear] Europop
                                      'tag_artist'  Aqua
                                     'tag_release'  Aquarium
                                       'tag_title'  Barbie Girl
                                             'bpm'  130.1
                                    'search_title'  'barbie':1 'girl':2
                                   'search_artist'  'aqua':1
                                  'search_release'  'aquarium':1
                                     'search_rest'  '8ohdear':2,3 'europop':4 'prev':5 'prevset':1 'set':6
                                    'search_combo'  '8ohdear':6,7 'aqua':3B 'aquarium':4C 'barbie':1A 'europop':8 'girl':2A 'prev':9 'prevset':5 'set':10
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['q-bass-3', 'q-drums-4', 'q-other-1', 'q-piano-1', 'q-vocals-3']
                                      'lastfmtags'  []
                                        'tag_date'  1997
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800392.5339422  (2022-09-10 10:59:52)
                             'size'  3170304