======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '237'
                                          'artist'  'Golden & Hughes'
                                     'text_people'  ''
                                         'release'  'Edison - 1611'
                                           'title'  'Darktown Eccentricities 1913'
                                           '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']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1913'
                                        'comments'  ''
                                           'genre'  'prerock-vocal'
                                             'bpm'  '118.8'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Edison - 1611'
'TBPM' (BPM (beats per minute))                     '118.8'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1913'
'TIT2' (Title/songname/content description)         'Darktown Eccentricities 1913'
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'Golden & Hughes'
'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'                                       '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'                        '+1.60 dB'
'TXXX:replaygain_track_peak'                        '0.366397'

========================== row from database ==========================
                                              'id'  514878
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Wax Cylinder／very old recordings： 1878-1920 [wma／32k]/1913 - Billy Golden - (Hughes) Darktown Eccentricities [speech].mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  237
                                           'genre'  prerock-vocal
                                        'filesize'  4747136
                                           'mtime'  1621853377
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm Wax Cylinder／very recordings： 1878 1920 [wma／32k] Billy (Hughes) [speech] prerock vocal
                                      'tag_artist'  Golden & Hughes
                                     'tag_release'  Edison - 1611
                                       'tag_title'  Darktown Eccentricities 1913
                                             'bpm'  118.8
                                    'search_title'  '1913':3 'darktown':1 'eccentricities':2
                                   'search_artist'  'golden':1 'hughes':2
                                  'search_release'  '1611':2 'edison':1
                                     'search_rest'  '1878':10 '1920':11 '32k':13,15,17 'billy':19 'cylinder':2,4 'cylindervery':6 'hughes':20,21 'prerock':24 'recordings':7,8,9 'speech':22,23 'very':3,5 'vocal':25 'wax':1 'wma':12,14,16 'wma32k':18
                                    'search_combo'  '1611':7C '1878':17 '1913':3A '1920':18 '32k':20,22,24 'billy':26 'cylinder':9,11 'cylindervery':13 'darktown':1A 'eccentricities':2A 'edison':6C 'golden':4B 'hughes':5B,27,28 'prerock':31 'recordings':14,15,16 'speech':29,30 'very':10,12 'vocal':32 'wax':8 'wma':19,21,23 'wma32k':25
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  3A
                                           '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'  []
                                        'tag_date'  1913
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621853377.150094  (2021-05-24 12:49:37)
                             'size'  4747136