======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '154'
                                          'artist'  'Jascha Heifetz'
                                     'text_people'  ''
                                         'release'  '[non-album tracks]'
                                           'title'  'Slavonic Dance No 2 Op 46 Dvorak'
                                           '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-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['instrumental', 'violin', 'classical', 'violin virtuoso']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1919'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '136.8'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:MusicMatch_Bio:eng'                           'Sound edited by Breda4@hotmail.com'
'TALB' (Album/Movie/Show title)                     '[non-album tracks]'
'TBPM' (BPM (beats per minute))                     '136.8'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1919'
'TIT2' (Title/songname/content description)         'Slavonic Dance No 2 Op 46 Dvorak'
'TKEY' (Initial key)                                '9A'
'TLEN' (Length)                                     '154000'
'TPE1' (Lead performer(s)/Soloist(s))               'Jascha Heifetz'
'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'                                   ['instrumental', 'violin', 'classical', 'violin virtuoso']
'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'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+2.57 dB'
'TXXX:replaygain_track_peak'                        '0.474463'

========================== row from database ==========================
                                              'id'  1465702
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1919/Jascha Heifetz violin - Slavonic Dance Op 46 No 2 (Dvorak) 1919.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  154
                                           'genre'  prerock-unsorted
                                        'filesize'  3167367
                                           'mtime'  1621697828
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1919 violin (Dvorak) 1919 prerock unsorted
                                      'tag_artist'  Jascha Heifetz
                                     'tag_release'  [non-album tracks]
                                       'tag_title'  Slavonic Dance No 2 Op 46 Dvorak
                                             'bpm'  136.8
                                    'search_title'  '2':4 '46':6 'dance':2 'dvorak':7 'no':3 'op':5 'slavonic':1
                                   'search_artist'  'heifetz':2 'jascha':1
                                  'search_release'  'album':2 'non':1 'nonalbum':3 'tracks':4,5
                                     'search_rest'  '00oldiepop':5 '1919':6 'country':4 'dvorak':8,9 'exotica':2 'jazz':1 'oldies':3 'prerock':10 'unsorted':11 'violin':7
                                    'search_combo'  '00oldiepop':19 '1919':20 '2':4A '46':6A 'album':11C 'country':18 'dance':2A 'dvorak':7A,22,23 'exotica':16 'heifetz':9B 'jascha':8B 'jazz':15 'no':3A 'non':10C 'nonalbum':12C 'oldies':17 'op':5A 'prerock':24 'slavonic':1A 'tracks':13C,14C 'unsorted':25 'violin':21
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', '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-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['instrumental', 'violin', 'classical', 'violin virtuoso']
                                        'tag_date'  1919
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621697828.1136198  (2021-05-22 17:37:08)
                             'size'  3167367