======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '185'
                                          'artist'  'Carsten Woll'
                                     'text_people'  ''
                                         'release'  'Edison Blue Amberol: 9246'
                                           'title'  'Aa kjöre vatten aa kjöre ve: Kjaerringa med staven'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'Q-LOCALNESS-3', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1920'
                                        'comments'  ''
                                           'genre'  'loc-eur-northern;prerock-vocal'
                                             'bpm'  '121.3'
                                             'key'  '12A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Edison Blue Amberol: 9246'
'TBPM' (BPM (beats per minute))                     '121.3'
'TCON' (Content type, a.k.a. Genre)                 ['loc-eur-northern', 'prerock-vocal']
'TCOP' (Copyright message)                          '© 2004 Regents of the University of California'
'TDRC' (Recording time)                             '1920'
'TIT2' (Title/songname/content description)         'Aa kjöre vatten aa kjöre ve: Kjaerringa med staven'
'TKEY' (Initial key)                                '12A'
'TPE1' (Lead performer(s)/Soloist(s))               'Carsten Woll'
'TXXX:Engineer'                                     'Noah Pollaczek'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'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'                        '+1.55 dB'
'TXXX:replaygain_track_peak'                        '0.559962'

========================== row from database ==========================
                                              'id'  514253
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Wax Cylinder／very old recordings： 1878-1920 [wma／32k]/1920 - Carsten Woll - Aa kjöre vatten aa kjöre ve - Kjærringa med staven.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  185
                                           'genre'  loc-eur-northern;prerock-vocal
                                        'filesize'  2977664
                                           'mtime'  1621629029
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm Wax Cylinder／very old recordings： 1878 1920 [wma／32k] 1920 Kjærringa loc eur northern;prerock vocal
                                      'tag_artist'  Carsten Woll
                                     'tag_release'  Edison Blue Amberol: 9246
                                       'tag_title'  Aa kjöre vatten aa kjöre ve: Kjaerringa med staven
                                             'bpm'  121.3
                                    'search_title'  'aa':1 'kjaerringa':7 'kjore':2,3 'med':8 'staven':9 'vatten':4 've':5,6
                                   'search_artist'  'carsten':1 'woll':2
                                  'search_release'  '9246':5 'amberol':3,4 'blue':2 'edison':1
                                     'search_rest'  '1878':11 '1920':12 '32k':14,16,18 'cylinder':2,4 'cylindervery':6 'eur':23 'kjaerringa':21 'kjærringa':20 'loc':22 'northern':24,26 'old':7 'prerock':25,27 'recordings':8,9,10 'very':3,5 'vocal':28 'wax':1 'wma':13,15,17 'wma32k':19
                                    'search_combo'  '1878':27 '1920':28 '32k':30,32,34 '9246':16C 'aa':1A 'amberol':14C,15C 'blue':13C 'carsten':10B 'cylinder':18,20 'cylindervery':22 'edison':12C 'eur':39 'kjaerringa':7A,37 'kjore':2A,3A 'kjærringa':36 'loc':38 'med':8A 'northern':40,42 'old':23 'prerock':41,43 'recordings':24,25,26 'staven':9A 'vatten':4A 've':5A,6A 'very':19,21 'vocal':44 'wax':17 'wma':29,31,33 'wma32k':35 'woll':11B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  12A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1920
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621629029.1018918  (2021-05-21 22:30:29)
                             'size'  2977664