======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '121'
                                          'artist'  'Zhang Ziqian'
                                     'text_people'  ''
                                         'release'  'Guangling Ming Dynasty'
                                           'title'  'The Sound'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-3', 'Q-HHRNBTT-1', 'Q-JZFKS-1', 'Q-OLDST-1', "
 "'Q-LOCALNESS-4', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-vocals-3', 'q-mixbeat-1', "
 "'Q-PIANO-3']")
                                      'lastfmtags'  "['traditional', 'wood and string', 'guqin', 'chinese']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1960'
                                        'comments'  ''
                                           'genre'  'loc-asia-china'
                                             'bpm'  '86.143'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'PRIV:AverageLevel:{\t\x00\x00'                     PRIV(owner='AverageLevel', data=b'{\t\x00\x00')
'PRIV:PeakValue:¡\x7f\x00\x00'                      PRIV(owner='PeakValue', data=b'\xa1\x7f\x00\x00')
'TALB' (Album/Movie/Show title)                     'Guangling Ming Dynasty'
'TBPM' (BPM (beats per minute))                     '86.143'
'TCON' (Content type, a.k.a. Genre)                 'loc-asia-china'
'TDRC' (Recording time)                             '1960'
'TIT2' (Title/songname/content description)         'The Sound'
'TKEY' (Initial key)                                '7B'
'TPE1' (Lead performer(s)/Soloist(s))               'Zhang Ziqian'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '4'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '3'
'TXXX:Q-UNU'                                        '3'
'TXXX:lastfmtags'                                   ['traditional', 'wood and string', 'guqin', 'chinese']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+3.94 dB'
'TXXX:replaygain_track_peak'                        '0.998956'
'TXXX:tracknum'                                     '09'

========================== row from database ==========================
                                              'id'  928786
                                            'path'  /data/Music/Bulk/00localcharacter/00asia/zhang ziqian - guangling faction ming dynasty/09 - track 9.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  121
                                           'genre'  loc-asia-china
                                        'filesize'  2913426
                                           'mtime'  1621627039
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 00asia zhang ziqian guangling faction ming dynasty 09 track 9 loc asia china
                                      'tag_artist'  Zhang Ziqian
                                     'tag_release'  Guangling Ming Dynasty
                                       'tag_title'  The Sound
                                             'bpm'  86.143
                                    'search_title'  'sound':2 'the':1
                                   'search_artist'  'zhang':1 'ziqian':2
                                  'search_release'  'dynasty':3 'guangling':1 'ming':2
                                     'search_rest'  '00asia':1 '9':9 'asia':11 'china':12 'dynasty':7 'faction':5 'guangling':4 'loc':10 'ming':6 'track':8 'zhang':2 'ziqian':3
                                    'search_combo'  '00asia':8 '9':16 'asia':18 'china':19 'dynasty':7C,14 'faction':12 'guangling':5C,11 'loc':17 'ming':6C,13 'sound':2A 'the':1A 'track':15 'zhang':3B,9 'ziqian':4B,10
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-4', 'q-mixbeat-1', 'Q-PIANO-3', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-3', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['traditional', 'wood and string', 'guqin', 'chinese']
                                        'tag_date'  1960
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621627038.6649015  (2021-05-21 21:57:18)
                             'size'  2913426