======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '263'
                                          'artist'  'Jussi Bjorling'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Celeste Aida (Verdi - Aida)'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['opera', 'tenor', 'classical', 'swedish', 'legend']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1938'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '142.6'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:MusicMatch_Bio:eng'                           'Sound edited by Breda4@hotmail.com'
'COMM:MusicMatch_Tempo:eng'                         'None'
'TBPM' (BPM (beats per minute))                     '142.6'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1938'
'TIT2' (Title/songname/content description)         'Celeste Aida (Verdi - Aida)'
'TKEY' (Initial key)                                '7B'
'TLEN' (Length)                                     '263000'
'TPE1' (Lead performer(s)/Soloist(s))               'Jussi Bjorling'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['opera', 'tenor', 'classical', 'swedish', 'legend']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.61 dB'
'TXXX:replaygain_track_peak'                        '0.648853'

========================== row from database ==========================
                                              'id'  1461087
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1938/Jussi Björling - Celeste Aida (Verdi - Aida) 1938.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  263
                                           'genre'  prerock-unsorted
                                        'filesize'  5300141
                                           'mtime'  1621698012
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1938 Björling 1938 prerock unsorted
                                      'tag_artist'  Jussi Bjorling
                                     'tag_release'  None
                                       'tag_title'  Celeste Aida (Verdi - Aida)
                                             'bpm'  142.6
                                    'search_title'  'aida':2,5 'celeste':1 'verdi':3,4
                                   'search_artist'  'bjorling':2 'jussi':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1938':6 'bjorling':7,8 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':9 'unsorted':10
                                    'search_combo'  '00oldiepop':12 '1938':13 'aida':2A,5A 'bjorling':7B,14,15 'celeste':1A 'country':11 'exotica':9 'jazz':8 'jussi':6B 'oldies':10 'prerock':16 'unsorted':17 'verdi':3A,4A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['opera', 'tenor', 'classical', 'swedish', 'legend']
                                        'tag_date'  1938
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621698012.1927848  (2021-05-22 17:40:12)
                             'size'  5300141