======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '210'
                                          'artist'  'Queen'
                                     'text_people'  ''
                                         'release'  'A Night at the Opera'
                                           'title'  "'39"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['80s', 'glam rock', 'rock', 'hard rock', 'classic rock']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '5'
                                      'tracktotal'  '12'
                                            'date'  '1975'
                                        'comments'  ''
                                           'genre'  'rock-cppex-classic'
                                             'bpm'  '101.0'
                                             'key'  '4B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'A Night at the Opera'
'TBPM' (BPM (beats per minute))                     '101.0'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex-classic'
'TDRC' (Recording time)                             '1975'
'TIT2' (Title/songname/content description)         "'39"
'TKEY' (Initial key)                                '4B'
'TPE1' (Lead performer(s)/Soloist(s))               'Queen'
'TPE2' (Band/orchestra/accompaniment)               'Queen'
'TRCK' (Track number/Position in set)               '5/12'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'rock'
'TXXX:lastfmtags'                                   ['80s', 'glam rock', 'rock', 'hard rock', 'classic rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.29 dB'
'TXXX:replaygain_track_peak'                        '0.744072'

========================== row from database ==========================
                                              'id'  1508475
                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/Queen/queen - a night at the opera - 1975/05 Queen - _39.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  210
                                           'genre'  rock-cppex-classic
                                        'filesize'  8524151
                                           'mtime'  1636038820
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy queen night opera 1975 05 _39 rock cppex classic
                                      'tag_artist'  Queen
                                     'tag_release'  A Night at the Opera
                                       'tag_title'  '39
                                             'bpm'  101.0
                                    'search_title'  '39':1,2
                                   'search_artist'  'queen':1
                                  'search_release'  'a':1 'at':3 'night':2 'opera':5 'the':4
                                     'search_rest'  '1975':5 '39':6 'classic':9 'classicprogpsy':1 'cppex':8 'night':3 'opera':4 'queen':2 'rock':7
                                    'search_combo'  '1975':13 '39':1A,2A,14 'a':4C 'at':6C 'classic':17 'classicprogpsy':9 'cppex':16 'night':5C,11 'opera':8C,12 'queen':3B,10 'rock':15 'the':7C
                                    'tag_tracknum'  5
                                      'num_images'  1
                                             'key'  4B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['80s', 'glam rock', 'rock', 'hard rock', 'classic rock']
                                        'tag_date'  1975
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1636038819.934453  (2021-11-04 16:13:39)
                             'size'  8524151