======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '141'
                                          'artist'  'Bonzo Dog Band'
                                     'text_people'  ''
                                         'release'  'Tadpoles'
                                           'title'  'Tubas In The Moonlight'
                                           'quals'  "['q-bass-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-3']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '03'
                                      'tracktotal'  ''
                                            'date'  '1969'
                                        'comments'  ''
                                           'genre'  'Oldies'
                                             'bpm'  '119.3'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'POPM:'                                             POPM(email='', rating=153)
'PRIV:www.mexp.dk:\x01\x0b\x00\x00\x00\x00good stuff\x01\x07\x00\x00\x00\x00active\x01\t\x00\x00\x00\x00cheerful\x01\x08\x00\x00\x00\x00amusing'  PRIV(owner='www.mexp.dk', data=b'\x01\x0b\x00\x00\x00\x00good stuff\x01\x07\x00\x00\x00\x00active\x01\t\x00\x00\x00\x00cheerful\x01\x08\x00\x00\x00\x00amusing')
'TALB' (Album/Movie/Show title)                     'Tadpoles'
'TBPM' (BPM (beats per minute))                     '119.3'
'TCON' (Content type, a.k.a. Genre)                 'Oldies'
'TDRC' (Recording time)                             '1969'
'TIT2' (Title/songname/content description)         'Tubas In The Moonlight'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Bonzo Dog Band'
'TRCK' (Track number/Position in set)               '03'
'TXXX:q-bass'                                       '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '3'

========================== row from database ==========================
                                              'id'  1538858
                                            'path'  /data/Music/Other/PrevSet/[8ohdear]/Bonzo Dog/Tubas In The Moonlight.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  141
                                           'genre'  Oldies
                                        'filesize'  4518062
                                           'mtime'  1662800427
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [8ohdear] Oldies
                                      'tag_artist'  Bonzo Dog Band
                                     'tag_release'  Tadpoles
                                       'tag_title'  Tubas In The Moonlight
                                             'bpm'  119.3
                                    'search_title'  'in':2 'moonlight':4 'the':3 'tubas':1
                                   'search_artist'  'band':3 'bonzo':1 'dog':2
                                  'search_release'  'tadpoles':1
                                     'search_rest'  '8ohdear':2,3 'oldies':4 'prev':5 'prevset':1 'set':6
                                    'search_combo'  '8ohdear':10,11 'band':7B 'bonzo':5B 'dog':6B 'in':2A 'moonlight':4A 'oldies':12 'prev':13 'prevset':9 'set':14 'tadpoles':8C 'the':3A 'tubas':1A
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['q-bass-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-3']
                                      'lastfmtags'  []
                                        'tag_date'  1969
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800427.4088166  (2022-09-10 11:00:27)
                             'size'  4518062