======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '138'
                                          'artist'  'Haydn Quartet with Billy Murray'
                                     'text_people'  ''
                                         'release'  'Victor-16049 (5320)'
                                           'title'  "Budweiser's a Friend Of Mine (1907) "
                                           '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-2', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '00'
                                      'tracktotal'  ''
                                            'date'  '1907'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '143.4'
                                             'key'  '2A'
                                        'acoustid'  ''
rest: ''

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

'COMM:MusicMatch_Preference:\x00\x00\x00'           'Excellent'
'COMM:MusicMatch_Tempo:\x00\x00\x00'                'None'
'TALB' (Album/Movie/Show title)                     'Victor-16049 (5320)'
'TBPM' (BPM (beats per minute))                     '143.4'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1907'
'TIT2' (Title/songname/content description)         "Budweiser's a Friend Of Mine (1907) "
'TKEY' (Initial key)                                '2A'
'TLEN' (Length)                                     '138000'
'TMED' (Media type)                                 'LIN'
'TPE1' (Lead performer(s)/Soloist(s))               'Haydn Quartet with Billy Murray'
'TRCK' (Track number/Position in set)               '00'
'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'                                       '2'
'TXXX:q-chart'                                      '2'
'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'                        '+1.89 dB'
'TXXX:replaygain_track_peak'                        '0.383305'

========================== row from database ==========================
                                              'id'  1498098
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Wax Cylinder／very old recordings： 1878-1920 [wma／32k]/1907 - Haydn Quartet with Billy Murray - Budweiser_s a Friend of Min.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  138
                                           'genre'  prerock-unsorted
                                        'filesize'  2215913
                                           'mtime'  1621698455
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm Wax Cylinder／very old recordings： 1878 1920 [wma／32k] Budweiser_s of prerock unsorted
                                      'tag_artist'  Haydn Quartet with Billy Murray
                                     'tag_release'  Victor-16049 (5320)
                                       'tag_title'  Budweiser's a Friend Of Mine (1907) 
                                             'bpm'  143.4
                                    'search_title'  '1907':8,9 'a':4 'budweiser':1 'budweisers':3 'friend':5 'mine':7 'of':6 's':2
                                   'search_artist'  'billy':4 'haydn':1 'murray':5 'quartet':2 'with':3
                                  'search_release'  '16049':2 '5320':4,5 'victor':1 'victor16049':3
                                     'search_rest'  '1878':11 '1920':12 '32k':14,16,18 'budweiser':20 'cylinder':2,4 'cylindervery':6 'of':22 'old':7 'prerock':23 'recordings':8,9,10 's':21 'unsorted':24 'very':3,5 'wax':1 'wma':13,15,17 'wma32k':19
                                    'search_combo'  '16049':16C '1878':30 '1907':8A,9A '1920':31 '32k':33,35,37 '5320':18C,19C 'a':4A 'billy':13B 'budweiser':1A,39 'budweisers':3A 'cylinder':21,23 'cylindervery':25 'friend':5A 'haydn':10B 'mine':7A 'murray':14B 'of':6A,41 'old':26 'prerock':42 'quartet':11B 'recordings':27,28,29 's':2A,40 'unsorted':43 'very':22,24 'victor':15C 'victor16049':17C 'wax':20 'with':12B 'wma':32,34,36 'wma32k':38
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  2A
                                           '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-2', 'q-other-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1907
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621698455.1168826  (2021-05-22 17:47:35)
                             'size'  2215913