======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '159'
                                          'artist'  'George J. Gaskin'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "I Don't Want To Play In Your Yard - (wax cylinder)"
                                           '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-1', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['grammophon', 'old', 'dead', '1890s', 'under 2000 listeners']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1895'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '139.7'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '139.7'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1895'
'TIT2' (Title/songname/content description)         "I Don't Want To Play In Your Yard - (wax cylinder)"
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'George J. Gaskin'
'TXXX:Mp3gain_minmax'                               '000,185'
'TXXX:Mp3gain_undo'                                 '+005,+005,N'
'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'                                   ['grammophon', 'old', 'dead', '1890s', 'under 2000 listeners']
'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'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+6.47 dB'
'TXXX:replaygain_track_peak'                        '0.867950'

========================== row from database ==========================
                                              'id'  1516987
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Wax Cylinder／very old recordings： 1878-1920 [wma／32k]/1895 - George J. Gaskin - I Don_t Want To Play In Your Yard - (wax cylinder).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  159
                                           'genre'  prerock-unsorted
                                        'filesize'  2548260
                                           'mtime'  1621698450
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm Wax Cylinder／very old recordings： 1878 1920 [wma／32k] 1895 Don_t prerock unsorted
                                      'tag_artist'  George J. Gaskin
                                     'tag_release'  None
                                       'tag_title'  I Don't Want To Play In Your Yard - (wax cylinder)
                                             'bpm'  139.7
                                    'search_title'  'cylinder':13,14 'don':2 'dont':4 'i':1 'in':8 'play':7 't':3 'to':6 'want':5 'wax':11,12 'yard':10 'your':9
                                   'search_artist'  'gaskin':4 'george':1 'j':2,3
                                  'search_release'  
                                     'search_rest'  '1878':11 '1895':20 '1920':12 '32k':14,16,18 'cylinder':2,4 'cylindervery':6 'don':21 'old':7 'prerock':23 'recordings':8,9,10 't':22 'unsorted':24 'very':3,5 'wax':1 'wma':13,15,17 'wma32k':19
                                    'search_combo'  '1878':29 '1895':38 '1920':30 '32k':32,34,36 'cylinder':13A,14A,20,22 'cylindervery':24 'don':2A,39 'dont':4A 'gaskin':18B 'george':15B 'i':1A 'in':8A 'j':16B,17B 'old':25 'play':7A 'prerock':41 'recordings':26,27,28 't':3A,40 'to':6A 'unsorted':42 'very':21,23 'want':5A 'wax':11A,12A,19 'wma':31,33,35 'wma32k':37 'yard':10A 'your':9A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6A
                                           '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-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['grammophon', 'old', 'dead', '1890s', 'under 2000 listeners']
                                        'tag_date'  1895
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621698449.606243  (2021-05-22 17:47:29)
                             'size'  2548260