======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '124'
                                          'artist'  'Harry MacDonough'
                                     'text_people'  ''
                                         'release'  'Victor 48 '
                                           'title'  'Sidewalks Of New York 2-12-1903'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-1', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['1900s', 'edison records', 'grammophon', '1890 1920', 'acoustic era']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '00'
                                      'tracktotal'  ''
                                            'date'  '1903'
                                        'comments'  ''
                                           'genre'  'prerock-vocal'
                                             'bpm'  '99.6'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'COMM:MusicMatch_Tempo:\x00\x00\x00'                'None'
'TALB' (Album/Movie/Show title)                     'Victor 48 '
'TBPM' (BPM (beats per minute))                     '99.6'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1903'
'TIT2' (Title/songname/content description)         'Sidewalks Of New York 2-12-1903'
'TKEY' (Initial key)                                '8A'
'TLEN' (Length)                                     '124000'
'TPE1' (Lead performer(s)/Soloist(s))               'Harry MacDonough'
'TRCK' (Track number/Position in set)               '00'
'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'                                   ['1900s', 'edison records', 'grammophon', '1890 1920', 'acoustic era']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'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'                        '+1.39 dB'
'TXXX:replaygain_track_peak'                        '0.498207'

========================== row from database ==========================
                                              'id'  513404
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Wax Cylinder／very old recordings： 1878-1920 [wma／32k]/1903 - Harry MacDonough - Sidewalks Of New York [speech].mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  124
                                           'genre'  prerock-vocal
                                        'filesize'  2499649
                                           'mtime'  1621853374
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm Wax Cylinder／very old recordings： 1878 1920 [wma／32k] [speech] prerock vocal
                                      'tag_artist'  Harry MacDonough
                                     'tag_release'  Victor 48 
                                       'tag_title'  Sidewalks Of New York 2-12-1903
                                             'bpm'  99.6
                                    'search_title'  '12':6 '1903':7 '2':5 '2121903':8 'new':3 'of':2 'sidewalks':1 'york':4
                                   'search_artist'  'donough':4 'harry':1 'mac':3 'macdonough':2
                                  'search_release'  '48':2 'victor':1
                                     'search_rest'  '1878':11 '1920':12 '32k':14,16,18 'cylinder':2,4 'cylindervery':6 'old':7 'prerock':22 'recordings':8,9,10 'speech':20,21 'very':3,5 'vocal':23 'wax':1 'wma':13,15,17 'wma32k':19
                                    'search_combo'  '12':6A '1878':25 '1903':7A '1920':26 '2':5A '2121903':8A '32k':28,30,32 '48':14C 'cylinder':16,18 'cylindervery':20 'donough':12B 'harry':9B 'mac':11B 'macdonough':10B 'new':3A 'of':2A 'old':21 'prerock':36 'recordings':22,23,24 'sidewalks':1A 'speech':34,35 'very':17,19 'victor':13C 'vocal':37 'wax':15 'wma':27,29,31 'wma32k':33 'york':4A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  8A
                                           '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-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['1900s', 'edison records', 'grammophon', '1890 1920', 'acoustic era']
                                        'tag_date'  1903
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621853373.964232  (2021-05-24 12:49:33)
                             'size'  2499649