======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '216'
                                          'artist'  'Aqua'
                                     'text_people'  ''
                                         'release'  'Aquarium'
                                           'title'  'Happy Boys & Girls'
                                           'quals'  "['q-bass-4', 'q-drums-4', 'q-other-1', 'q-piano-1', 'q-vocals-3']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'Other'
                                             'bpm'  '131.9'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'POPM:'                                             POPM(email='', rating=153)
'PRIV:www.mexp.dk:\x01\t\x00\x00\x00\x00cheerful'   PRIV(owner='www.mexp.dk', data=b'\x01\t\x00\x00\x00\x00cheerful')
'TALB' (Album/Movie/Show title)                     'Aquarium'
'TBPM' (BPM (beats per minute))                     '131.9'
'TCON' (Content type, a.k.a. Genre)                 'Other'
'TIT2' (Title/songname/content description)         'Happy Boys & Girls'
'TKEY' (Initial key)                                '7B'
'TPE1' (Lead performer(s)/Soloist(s))               'Aqua'
'TRCK' (Track number/Position in set)               '1'
'TXXX:MusicBrainz Album Id'                         '6faa4168-52d1-4375-8b67-2b143a370a75'
'TXXX:MusicBrainz Artist Id'                        'a1ed5e33-22ff-4e7d-a457-42f4309e135f'
'TXXX:MusicBrainz TRM Id'                           'f58d2d6a-8102-4a8c-b1d5-7497519c06bb'
'TXXX:q-bass'                                       '4'
'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'311c9619-8d34-4efe-804b-fa4b949dbe91')

========================== row from database ==========================
                                              'id'  1538194
                                            'path'  /data/Music/Other/PrevSet/[8ohdear]/Aqua/Happy Boys & Girls.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  216
                                           'genre'  Other
                                        'filesize'  3473408
                                           'mtime'  1662800421
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [8ohdear] Other
                                      'tag_artist'  Aqua
                                     'tag_release'  Aquarium
                                       'tag_title'  Happy Boys & Girls
                                             'bpm'  131.9
                                    'search_title'  'boys':2 'girls':3 'happy':1
                                   'search_artist'  'aqua':1
                                  'search_release'  'aquarium':1
                                     'search_rest'  '8ohdear':2,3 'other':4 'prev':5 'prevset':1 'set':6
                                    'search_combo'  '8ohdear':7,8 'aqua':4B 'aquarium':5C 'boys':2A 'girls':3A 'happy':1A 'other':9 'prev':10 'prevset':6 'set':11
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  7B
                                           'quals'  ['q-bass-4', 'q-drums-4', 'q-other-1', 'q-piano-1', 'q-vocals-3']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800421.385011  (2022-09-10 11:00:21)
                             'size'  3473408