======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '28'
                                          'artist'  'spoken word'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Will Rogers on How to End the War'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-JZFKS-2', '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-1', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['philosophy', 'law', 'spoken word']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1917'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted'
                                             'bpm'  '91.1'
                                             'key'  '11A'
                                        'acoustid'  ''
rest: ''

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

'PRIV:WM/MediaClassPrimaryID:¼}`Ñ#ãâK\x86¡H¤*(D\x1e'  PRIV(owner='WM/MediaClassPrimaryID', data=b'\xbc}`\xd1#\xe3\xe2K\x86\xa1H\xa4*(D\x1e')
'PRIV:WM/MediaClassSecondaryID:\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'  PRIV(owner='WM/MediaClassSecondaryID', data=b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
'TBPM' (BPM (beats per minute))                     '91.1'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-unsorted'
'TDRC' (Recording time)                             '1917'
'TIT2' (Title/songname/content description)         'Will Rogers on How to End the War'
'TKEY' (Initial key)                                '11A'
'TPE1' (Lead performer(s)/Soloist(s))               'spoken word'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['philosophy', 'law', 'spoken word']
'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'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.54 dB'
'TXXX:replaygain_track_peak'                        '0.326257'

========================== row from database ==========================
                                              'id'  511578
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Wax Cylinder／very old recordings： 1878-1920 [wma／32k]/1917 - spoken word - Will Rogers on How to End the War.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  28
                                           'genre'  prerock-jb-jazz-unsorted
                                        'filesize'  459254
                                           'mtime'  1620539139
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm Wax Cylinder／very old recordings： 1878 1920 [wma／32k] 1917 prerock jb jazz unsorted
                                      'tag_artist'  spoken word
                                     'tag_release'  None
                                       'tag_title'  Will Rogers on How to End the War
                                             'bpm'  91.1
                                    'search_title'  'end':6 'how':4 'on':3 'rogers':2 'the':7 'to':5 'war':8 'will':1
                                   'search_artist'  'spoken':1 'word':2
                                  'search_release'  
                                     'search_rest'  '1878':11 '1917':20 '1920':12 '32k':14,16,18 'cylinder':2,4 'cylindervery':6 'jazz':23 'jb':22 'old':7 'prerock':21 'recordings':8,9,10 'unsorted':24 'very':3,5 'wax':1 'wma':13,15,17 'wma32k':19
                                    'search_combo'  '1878':21 '1917':30 '1920':22 '32k':24,26,28 'cylinder':12,14 'cylindervery':16 'end':6A 'how':4A 'jazz':33 'jb':32 'old':17 'on':3A 'prerock':31 'recordings':18,19,20 'rogers':2A 'spoken':9B 'the':7A 'to':5A 'unsorted':34 'very':13,15 'war':8A 'wax':11 'will':1A 'wma':23,25,27 'wma32k':29 'word':10B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  11A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['philosophy', 'law', 'spoken word']
                                        'tag_date'  1917
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620539139.0455196  (2021-05-09 07:45:39)
                             'size'  459254