======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '117'
                                          'artist'  'The Arrogant Worms'
                                     'text_people'  ''
                                         'release'  'Dirt!'
                                           'title'  'Great to be a Nerd'
                                           'quals'  "['q-bass-4', 'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-4']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  ''
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  ''
                                             'bpm'  '85.7'
                                             'key'  '8B'
                                        'acoustid'  ''
rest: ''

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

'POPM:'                                             POPM(email='', rating=153)
'PRIV:www.mexp.dk:\x01\x06\x00\x00\x00\x0000-09\x01\x07\x00\x00\x00\x00active\x01\x06\x00\x00\x00\x00funny\x01\x05\x00\x00\x00\x00folk'  PRIV(owner='www.mexp.dk', data=b'\x01\x06\x00\x00\x00\x0000-09\x01\x07\x00\x00\x00\x00active\x01\x06\x00\x00\x00\x00funny\x01\x05\x00\x00\x00\x00folk')
'TALB' (Album/Movie/Show title)                     'Dirt!'
'TBPM' (BPM (beats per minute))                     '85.7'
'TDOR' (Original release time)                      '1999'
'TDRC' (Recording time)                             '2000'
'TIT2' (Title/songname/content description)         'Great to be a Nerd'
'TKEY' (Initial key)                                '8B'
'TPE1' (Lead performer(s)/Soloist(s))               'The Arrogant Worms'
'TRCK' (Track number/Position in set)               '3'
'TXXX:MusicBrainz Album Id'                         'd7c4ee36-fdb6-4c0f-a66e-2158b4ff9bde'
'TXXX:MusicBrainz Album Release Country'            'CA'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        'e18a07b6-2df5-47ca-a3fc-6dbd3a2ef8cc'
'TXXX:MusicBrainz TRM Id'                           'be7e79bc-6fc9-4b59-9da8-fdcd3640cba8'
'TXXX:q-bass'                                       '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '4'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'62ee0228-7996-4fdb-8272-27cc30f0ed47')
'UFID:musicbrainz'                                  UFID(owner='musicbrainz', data=b'62ee0228-7996-4fdb-8272-27cc30f0ed47')

========================== row from database ==========================
                                              'id'  1538095
                                            'path'  /data/Music/Other/PrevSet/[9amusing]/The Arrogant Worms/Great to be a Nerd.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  117
                                           'genre'  
                                        'filesize'  1880064
                                           'mtime'  1662800546
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [9amusing]
                                      'tag_artist'  The Arrogant Worms
                                     'tag_release'  Dirt!
                                       'tag_title'  Great to be a Nerd
                                             'bpm'  85.7
                                    'search_title'  'a':4 'be':3 'great':1 'nerd':5 'to':2
                                   'search_artist'  'arrogant':2 'the':1 'worms':3
                                  'search_release'  'dirt':1
                                     'search_rest'  '9amusing':2,3 'prev':4 'prevset':1 'set':5
                                    'search_combo'  '9amusing':11,12 'a':4A 'arrogant':7B 'be':3A 'dirt':9C 'great':1A 'nerd':5A 'prev':13 'prevset':10 'set':14 'the':6B 'to':2A 'worms':8B
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  8B
                                           'quals'  ['q-bass-4', 'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-4']
                                      'lastfmtags'  []
                                        'tag_date'  2000
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800545.6130009  (2022-09-10 11:02:25)
                             'size'  1880064