======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '160'
                                          'artist'  'Imperial Minstrels-Len Spencer & Steve Porter'
                                     'text_people'  ''
                                         'release'  'Columbia-13000'
                                           'title'  'Dese Bones Shall Rise Again (1900)'
                                           '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-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1900'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '123.9'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'COMM:MusicMatch_Preference:\x00\x00\x00'           'Excellent'
'COMM:MusicMatch_Tempo:\x00\x00\x00'                'None'
'TALB' (Album/Movie/Show title)                     'Columbia-13000'
'TBPM' (BPM (beats per minute))                     '123.9'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1900'
'TIT2' (Title/songname/content description)         'Dese Bones Shall Rise Again (1900)'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Imperial Minstrels-Len Spencer & Steve Porter'
'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'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.80 dB'
'TXXX:replaygain_track_peak'                        '0.355477'

========================== row from database ==========================
                                              'id'  511677
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Wax Cylinder／very old recordings： 1878-1920 [wma／32k]/1900 - Len Spencer & Steve Porter - Imperial Minstrels - Dese Bones Shall Rise Again.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  160
                                           'genre'  prerock-unsorted
                                        'filesize'  2572811
                                           'mtime'  1621698455
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm Wax Cylinder／very old recordings： 1878 1920 [wma／32k] prerock unsorted
                                      'tag_artist'  Imperial Minstrels-Len Spencer & Steve Porter
                                     'tag_release'  Columbia-13000
                                       'tag_title'  Dese Bones Shall Rise Again (1900)
                                             'bpm'  123.9
                                    'search_title'  '1900':6,7 'again':5 'bones':2 'dese':1 'rise':4 'shall':3
                                   'search_artist'  'imperial':1 'len':3 'minstrels':2 'minstrelslen':4 'porter':7 'spencer':5 'steve':6
                                  'search_release'  '13000':2 'columbia':1 'columbia13000':3
                                     'search_rest'  '1878':11 '1920':12 '32k':14,16,18 'cylinder':2,4 'cylindervery':6 'old':7 'prerock':20 'recordings':8,9,10 'unsorted':21 'very':3,5 'wax':1 'wma':13,15,17 'wma32k':19
                                    'search_combo'  '13000':16C '1878':28 '1900':6A,7A '1920':29 '32k':31,33,35 'again':5A 'bones':2A 'columbia':15C 'columbia13000':17C 'cylinder':19,21 'cylindervery':23 'dese':1A 'imperial':8B 'len':10B 'minstrels':9B 'minstrelslen':11B 'old':24 'porter':14B 'prerock':37 'recordings':25,26,27 'rise':4A 'shall':3A 'spencer':12B 'steve':13B 'unsorted':38 'very':20,22 'wax':18 'wma':30,32,34 'wma32k':36
                                    '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-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1900
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621698455.0163884  (2021-05-22 17:47:35)
                             'size'  2572811