======================== unified (from filesystem) ========================
                                         'bitrate'  '64.0'
                                        'duration'  '285'
                                          'artist'  'Going To The Races'
                                     'text_people'  ''
                                         'release'  'HMV C545'
                                           'title'  'Dan Leno'
                                           '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']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1903'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '133.7'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'HMV C545'
'TBPM' (BPM (beats per minute))                     '133.7'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1903'
'TIT2' (Title/songname/content description)         'Dan Leno'
'TKEY' (Initial key)                                '7A'
'TPE1' (Lead performer(s)/Soloist(s))               'Going To The Races'
'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'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.94 dB'
'TXXX:replaygain_track_peak'                        '0.676931'

========================== row from database ==========================
                                              'id'  510867
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Wax Cylinder／very old recordings： 1878-1920 [wma／32k]/1903 - Dan Leno - Going To The Races [speech].mp3
                                         'working'  None
                                         'bitrate'  64
                                    'duration_sec'  285
                                           'genre'  prerock-unsorted
                                        'filesize'  2310307
                                           'mtime'  1621698455
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm Wax Cylinder／very old recordings： 1878 1920 [wma／32k] 1903 [speech] prerock unsorted
                                      'tag_artist'  Going To The Races
                                     'tag_release'  HMV C545
                                       'tag_title'  Dan Leno
                                             'bpm'  133.7
                                    'search_title'  'dan':1 'leno':2
                                   'search_artist'  'going':1 'races':4 'the':3 'to':2
                                  'search_release'  'c545':2 'hmv':1
                                     'search_rest'  '1878':11 '1903':20 '1920':12 '32k':14,16,18 'cylinder':2,4 'cylindervery':6 'old':7 'prerock':23 'recordings':8,9,10 'speech':21,22 'unsorted':24 'very':3,5 'wax':1 'wma':13,15,17 'wma32k':19
                                    'search_combo'  '1878':19 '1903':28 '1920':20 '32k':22,24,26 'c545':8C 'cylinder':10,12 'cylindervery':14 'dan':1A 'going':3B 'hmv':7C 'leno':2A 'old':15 'prerock':31 'races':6B 'recordings':16,17,18 'speech':29,30 'the':5B 'to':4B 'unsorted':32 'very':11,13 'wax':9 'wma':21,23,25 'wma32k':27
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  7A
                                           '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'  []
                                        'tag_date'  1903
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621698455.0438244  (2021-05-22 17:47:35)
                             'size'  2310307