======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '261'
                                          'artist'  'Light Opera Company'
                                     'text_people'  ''
                                         'release'  'Edison Blue Amberol  1823'
                                           'title'  "Favorite Airs From ' Patience ' (Gilbert - Sullivan)"
                                           '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-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1913'
                                        'comments'  ''
                                           'genre'  'prerock-vocal'
                                             'bpm'  '125.1'
                                             'key'  '5B'
                                        '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)                     'Edison Blue Amberol  1823'
'TBPM' (BPM (beats per minute))                     '125.1'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1913'
'TIT2' (Title/songname/content description)         "Favorite Airs From ' Patience ' (Gilbert - Sullivan)"
'TKEY' (Initial key)                                '5B'
'TLEN' (Length)                                     '261000'
'TPE1' (Lead performer(s)/Soloist(s))               'Light Opera Company'
'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:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+3.24 dB'
'TXXX:replaygain_track_peak'                        '0.535215'

========================== row from database ==========================
                                              'id'  1519781
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1913/Light Opera Company - Favorite Airs From _ Patience _ (Gilbert - Sullivan) 1913 Edison.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  261
                                           'genre'  prerock-vocal
                                        'filesize'  5314282
                                           'mtime'  1620666169
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1913 _ _ 1913 prerock vocal
                                      'tag_artist'  Light Opera Company
                                     'tag_release'  Edison Blue Amberol  1823
                                       'tag_title'  Favorite Airs From ' Patience ' (Gilbert - Sullivan)
                                             'bpm'  125.1
                                    'search_title'  'airs':2 'favorite':1 'from':3 'gilbert':5,6 'patience':4 'sullivan':7,8
                                   'search_artist'  'company':3 'light':1 'opera':2
                                  'search_release'  '1823':4 'amberol':3 'blue':2 'edison':1
                                     'search_rest'  '00oldiepop':5 '1913':6 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':7 'vocal':8
                                    'search_combo'  '00oldiepop':20 '1823':15C '1913':21 'airs':2A 'amberol':14C 'blue':13C 'company':11B 'country':19 'edison':12C 'exotica':17 'favorite':1A 'from':3A 'gilbert':5A,6A 'jazz':16 'light':9B 'oldies':18 'opera':10B 'patience':4A 'prerock':22 'sullivan':7A,8A 'vocal':23
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  5B
                                           '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-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1913
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620666169.3323398  (2021-05-10 19:02:49)
                             'size'  5314282