======================== unified (from filesystem) ========================
                                         'bitrate'  '64.0'
                                        'duration'  '159'
                                          'artist'  'George J Gaskin'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "It Don't Seem Like The Same Old Smile (Cylinder-Columbia 4090)"
                                           '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-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['1890s', 'dead', 'old', 'under 2000 listeners', 'grammophon']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1897'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '92.4'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '92.4'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1897'
'TIT2' (Title/songname/content description)         "It Don't Seem Like The Same Old Smile (Cylinder-Columbia 4090)"
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'George J Gaskin'
'TXXX:Mp3gain_minmax'                               '082,174'
'TXXX:Mp3gain_undo'                                 '+003,+003,N'
'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:lastfmtags'                                   ['1890s', 'dead', 'old', 'under 2000 listeners', 'grammophon']
'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'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.49 dB'
'TXXX:replaygain_track_peak'                        '0.593606'

========================== row from database ==========================
                                              'id'  1500528
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Wax Cylinder／very old recordings： 1878-1920 [wma／32k]/1897 - George J Gaskin - It Don_t Seem Like The Same Old Smile (Cylinder-Columbia 4090).mp3
                                         'working'  None
                                         'bitrate'  64
                                    'duration_sec'  159
                                           'genre'  prerock-unsorted
                                        'filesize'  1279149
                                           'mtime'  1621698450
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm Wax Cylinder／very old recordings： 1878 1920 [wma／32k] 1897 Don_t prerock unsorted
                                      'tag_artist'  George J Gaskin
                                     'tag_release'  None
                                       'tag_title'  It Don't Seem Like The Same Old Smile (Cylinder-Columbia 4090)
                                             'bpm'  92.4
                                    'search_title'  '4090':14,15 'columbia':12 'cylinder':11 'cylindercolumbia':13 'don':2 'dont':4 'it':1 'like':6 'old':9 'same':8 'seem':5 'smile':10 't':3 'the':7
                                   'search_artist'  'gaskin':3 'george':1 'j':2
                                  'search_release'  
                                     'search_rest'  '1878':11 '1897':20 '1920':12 '32k':14,16,18 'cylinder':2,4 'cylindervery':6 'don':21 'old':7 'prerock':23 'recordings':8,9,10 't':22 'unsorted':24 'very':3,5 'wax':1 'wma':13,15,17 'wma32k':19
                                    'search_combo'  '1878':29 '1897':38 '1920':30 '32k':32,34,36 '4090':14A,15A 'columbia':12A 'cylinder':11A,20,22 'cylindercolumbia':13A 'cylindervery':24 'don':2A,39 'dont':4A 'gaskin':18B 'george':16B 'it':1A 'j':17B 'like':6A 'old':9A,25 'prerock':41 'recordings':26,27,28 'same':8A 'seem':5A 'smile':10A 't':3A,40 'the':7A 'unsorted':42 'very':21,23 'wax':19 'wma':31,33,35 'wma32k':37
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  9A
                                           '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-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['1890s', 'dead', 'old', 'under 2000 listeners', 'grammophon']
                                        'tag_date'  1897
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621698449.652888  (2021-05-22 17:47:29)
                             'size'  1279149