======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '115'
                                          'artist'  'The Arrogant Worms'
                                     'text_people'  ''
                                         'release'  "C'est Cheese"
                                           'title'  'The Happy Happy Birthday Song'
                                           'quals'  "['q-bass-4', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '9'
                                      'tracktotal'  ''
                                            'date'  '1995'
                                        'comments'  ''
                                           'genre'  ''
                                             'bpm'  '144.1'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'POPM:'                                             POPM(email='', rating=153)
'PRIV:www.mexp.dk:\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\x07\x00\x00\x00\x00active\x01\x06\x00\x00\x00\x00funny\x01\x05\x00\x00\x00\x00folk')
'TALB' (Album/Movie/Show title)                     "C'est Cheese"
'TBPM' (BPM (beats per minute))                     '144.1'
'TDOR' (Original release time)                      '1995'
'TIT2' (Title/songname/content description)         'The Happy Happy Birthday Song'
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'The Arrogant Worms'
'TRCK' (Track number/Position in set)               '9'
'TXXX:MusicBrainz Album Id'                         'cd98b708-cb1f-4328-8170-475679d2859b'
'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'                           '41cb6be8-24d3-4621-9790-b89f68c8e437'
'TXXX:q-bass'                                       '4'
'TXXX:q-drums'                                      '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '4'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'a9fd6cd9-c8b4-412b-9cfc-f0337b7da81c')
'UFID:musicbrainz'                                  UFID(owner='musicbrainz', data=b'a9fd6cd9-c8b4-412b-9cfc-f0337b7da81c')

========================== row from database ==========================
                                              'id'  1538242
                                            'path'  /data/Music/Other/PrevSet/[9amusing]/The Arrogant Worms/The Happy Happy Birthday Song.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  115
                                           'genre'  
                                        'filesize'  1843200
                                           'mtime'  1662800512
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [9amusing]
                                      'tag_artist'  The Arrogant Worms
                                     'tag_release'  C'est Cheese
                                       'tag_title'  The Happy Happy Birthday Song
                                             'bpm'  144.1
                                    'search_title'  'birthday':3 'happy':2 'song':4 'the':1
                                   'search_artist'  'arrogant':2 'the':1 'worms':3
                                  'search_release'  'c':1 'cest':3 'cheese':4 'est':2
                                     'search_rest'  '9amusing':2,3 'prev':4 'prevset':1 'set':5
                                    'search_combo'  '9amusing':13,14 'arrogant':6B 'birthday':3A 'c':8C 'cest':10C 'cheese':11C 'est':9C 'happy':2A 'prev':15 'prevset':12 'set':16 'song':4A 'the':1A,5B 'worms':7B
                                    'tag_tracknum'  9
                                      'num_images'  0
                                             'key'  9B
                                           'quals'  ['q-bass-4', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4']
                                      'lastfmtags'  []
                                        'tag_date'  1995
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800512.1060824  (2022-09-10 11:01:52)
                             'size'  1843200