======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '74'
                                          'artist'  'Len Spencer'
                                     'text_people'  ''
                                         'release'  'Columbia-7236'
                                           'title'  'All Coons Look Alike to Me (1896)'
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-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'  "['1900s', 'old fashioned', 'all', 'oldies', 'acoustic era']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '00'
                                      'tracktotal'  ''
                                            'date'  '1896'
                                        'comments'  ''
                                           'genre'  'prerock-nonmusic'
                                             'bpm'  '97.2'
                                             'key'  '9A'
                                        '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-7236'
'TBPM' (BPM (beats per minute))                     '97.2'
'TCON' (Content type, a.k.a. Genre)                 'prerock-nonmusic'
'TDRC' (Recording time)                             '1896'
'TIT2' (Title/songname/content description)         'All Coons Look Alike to Me (1896)'
'TKEY' (Initial key)                                '9A'
'TLEN' (Length)                                     '74000'
'TMED' (Media type)                                 'DIG'
'TPE1' (Lead performer(s)/Soloist(s))               'Len Spencer'
'TRCK' (Track number/Position in set)               '00'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['1900s', 'old fashioned', 'all', 'oldies', 'acoustic era']
'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'                        '+2.55 dB'
'TXXX:replaygain_track_peak'                        '0.889589'

========================== row from database ==========================
                                              'id'  513745
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Wax Cylinder／very old recordings： 1878-1920 [wma／32k]/1896 - Len Spencer - All Coons Look Alike to Me (Columbia-7236).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  74
                                           'genre'  prerock-nonmusic
                                        'filesize'  1186449
                                           'mtime'  1674646639
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm Wax Cylinder／very old recordings： 1878 1920 [wma／32k] (Columbia 7236) prerock nonmusic
                                      'tag_artist'  Len Spencer
                                     'tag_release'  Columbia-7236
                                       'tag_title'  All Coons Look Alike to Me (1896)
                                             'bpm'  97.2
                                    'search_title'  '1896':7,8 'alike':4 'all':1 'coons':2 'look':3 'me':6 'to':5
                                   'search_artist'  'len':1 'spencer':2
                                  'search_release'  '7236':2 'columbia':1 'columbia7236':3
                                     'search_rest'  '1878':11 '1920':12 '32k':14,16,18 '7236':22,23 'columbia':20,21 'cylinder':2,4 'cylindervery':6 'nonmusic':25 'old':7 'prerock':24 'recordings':8,9,10 'very':3,5 'wax':1 'wma':13,15,17 'wma32k':19
                                    'search_combo'  '1878':24 '1896':7A,8A '1920':25 '32k':27,29,31 '7236':12C,35,36 'alike':4A 'all':1A 'columbia':11C,33,34 'columbia7236':13C 'coons':2A 'cylinder':15,17 'cylindervery':19 'len':9B 'look':3A 'me':6A 'nonmusic':38 'old':20 'prerock':37 'recordings':21,22,23 'spencer':10B 'to':5A 'very':16,18 'wax':14 'wma':26,28,30 'wma32k':32
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HAP-2', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-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'  ['1900s', 'old fashioned', 'all', 'oldies', 'acoustic era']
                                        'tag_date'  1896
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1674646639.4722855  (2023-01-25 12:37:19)
                             'size'  1186449