======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '65'
                                          'artist'  'DeWolf Hopper'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'You Can Always Explain Things Away 1890 Columbia'
                                           '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-2', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1890'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '139.0'
                                             'key'  '12A'
                                        'acoustid'  ''
rest: ''

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

'COMM:MusicMatch_Bio:eng'                           'Sound changed by Breda4@hotmail.com'
'PRIV:AverageLevel:î\t\x00\x00'                     PRIV(owner='AverageLevel', data=b'\xee\t\x00\x00')
'PRIV:PeakValue:ht\x00\x00'                         PRIV(owner='PeakValue', data=b'ht\x00\x00')
'TBPM' (BPM (beats per minute))                     '139.0'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1890'
'TIT2' (Title/songname/content description)         'You Can Always Explain Things Away 1890 Columbia'
'TKEY' (Initial key)                                '12A'
'TLEN' (Length)                                     '65000'
'TPE1' (Lead performer(s)/Soloist(s))               'DeWolf Hopper'
'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'                                      '2'
'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'                        '+2.65 dB'
'TXXX:replaygain_track_peak'                        '0.764762'

========================== row from database ==========================
                                              'id'  514286
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Wax Cylinder／very old recordings： 1878-1920 [wma／32k]/1890 - DeWolf Hopper - You Can Always Explain Things Away.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  65
                                           'genre'  prerock-unsorted
                                        'filesize'  1311828
                                           'mtime'  1621698444
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm Wax Cylinder／very old recordings： 1878 1920 [wma／32k] prerock unsorted
                                      'tag_artist'  DeWolf Hopper
                                     'tag_release'  None
                                       'tag_title'  You Can Always Explain Things Away 1890 Columbia
                                             'bpm'  139.0
                                    'search_title'  '1890':7 'always':3 'away':6 'can':2 'columbia':8 'explain':4 'things':5 'you':1
                                   'search_artist'  'de':3 'dewolf':1 'hopper':2 'wolf':4
                                  'search_release'  
                                     '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'  '1878':23 '1890':7A '1920':24 '32k':26,28,30 'always':3A 'away':6A 'can':2A 'columbia':8A 'cylinder':14,16 'cylindervery':18 'de':11B 'dewolf':9B 'explain':4A 'hopper':10B 'old':19 'prerock':32 'recordings':20,21,22 'things':5A 'unsorted':33 'very':15,17 'wax':13 'wma':25,27,29 'wma32k':31 'wolf':12B 'you':1A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  12A
                                           '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-2', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1890
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621698444.2268584  (2021-05-22 17:47:24)
                             'size'  1311828