======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '171'
                                          'artist'  'Albert Bol'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'K-K-K-Kaatje 1919'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'Q-LOCALNESS-3', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['vaudeville', 'cylinder', 'early recordings']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '00'
                                      'tracktotal'  ''
                                            'date'  '1919'
                                        'comments'  ''
                                           'genre'  'loc-eur-netherlands;prerock-vocal'
                                             'bpm'  '113.5'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'COMM:MusicMatch_Bio:\x00\x00\x00'                  'Sound changed by Breda4@hotmail.com '
'COMM:MusicMatch_Tempo:\x00\x00\x00'                'None'
'TBPM' (BPM (beats per minute))                     '113.5'
'TCON' (Content type, a.k.a. Genre)                 ['loc-eur-netherlands', 'prerock-vocal']
'TDRC' (Recording time)                             '1919'
'TIT2' (Title/songname/content description)         'K-K-K-Kaatje 1919'
'TKEY' (Initial key)                                '1A'
'TLEN' (Length)                                     '171000'
'TPE1' (Lead performer(s)/Soloist(s))               'Albert Bol'
'TRCK' (Track number/Position in set)               '00'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['vaudeville', 'cylinder', 'early recordings']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'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'                        '+1.70 dB'
'TXXX:replaygain_track_peak'                        '0.576108'

========================== row from database ==========================
                                              'id'  512358
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Wax Cylinder／very old recordings： 1878-1920 [wma／32k]/1919 - Albert Bol - K-K-K-Kaatje.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  171
                                           'genre'  loc-eur-netherlands;prerock-vocal
                                        'filesize'  3426905
                                           'mtime'  1621629029
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm Wax Cylinder／very old recordings： 1878 1920 [wma／32k] loc eur netherlands;prerock vocal
                                      'tag_artist'  Albert Bol
                                     'tag_release'  None
                                       'tag_title'  K-K-K-Kaatje 1919
                                             'bpm'  113.5
                                    'search_title'  '1919':6 'k':1,2,3 'kaatje':4 'kkkkaatje':5
                                   'search_artist'  'albert':1 'bol':2
                                  'search_release'  
                                     'search_rest'  '1878':11 '1920':12 '32k':14,16,18 'cylinder':2,4 'cylindervery':6 'eur':21 'loc':20 'netherlands':22,24 'old':7 'prerock':23,25 'recordings':8,9,10 'very':3,5 'vocal':26 'wax':1 'wma':13,15,17 'wma32k':19
                                    'search_combo'  '1878':19 '1919':6A '1920':20 '32k':22,24,26 'albert':7B 'bol':8B 'cylinder':10,12 'cylindervery':14 'eur':29 'k':1A,2A,3A 'kaatje':4A 'kkkkaatje':5A 'loc':28 'netherlands':30,32 'old':15 'prerock':31,33 'recordings':16,17,18 'very':11,13 'vocal':34 'wax':9 'wma':21,23,25 'wma32k':27
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['vaudeville', 'cylinder', 'early recordings']
                                        'tag_date'  1919
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621629029.0242476  (2021-05-21 22:30:29)
                             'size'  3426905