======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '224'
                                          'artist'  'Otto Clausen'
                                     'text_people'  ''
                                         'release'  'Edison Blue Amberol: 9227'
                                           'title'  'Aa kjore vatten aa kjoere vé'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-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-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['cylinder']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1913'
                                        'comments'  ''
                                           'genre'  'prerock-vocal-male'
                                             'bpm'  '84.5'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Edison Blue Amberol: 9227'
'TBPM' (BPM (beats per minute))                     '84.5'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal-male'
'TCOP' (Copyright message)                          '© 2004 Regents of the University of California'
'TDRC' (Recording time)                             '1913'
'TIT2' (Title/songname/content description)         'Aa kjore vatten aa kjoere vé'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Otto Clausen'
'TXXX:Engineer'                                     'Noah Pollaczek'
'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'                                   'cylinder'
'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'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.37 dB'
'TXXX:replaygain_track_peak'                        '0.675833'

========================== row from database ==========================
                                              'id'  512779
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Wax Cylinder／very old recordings： 1878-1920 [wma／32k]/1913 - Otto Clausen - Aa kjore vatten aa kjoere vé.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  224
                                           'genre'  prerock-vocal-male
                                        'filesize'  3593383
                                           'mtime'  1621625790
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm Wax Cylinder／very old recordings： 1878 1920 [wma／32k] 1913 prerock vocal male
                                      'tag_artist'  Otto Clausen
                                     'tag_release'  Edison Blue Amberol: 9227
                                       'tag_title'  Aa kjore vatten aa kjoere vé
                                             'bpm'  84.5
                                    'search_title'  'aa':1 'kjoere':4 'kjore':2 'vatten':3 've':5,6
                                   'search_artist'  'clausen':2 'otto':1
                                  'search_release'  '9227':5 'amberol':3,4 'blue':2 'edison':1
                                     'search_rest'  '1878':11 '1913':20 '1920':12 '32k':14,16,18 'cylinder':2,4 'cylindervery':6 'male':23 'old':7 'prerock':21 'recordings':8,9,10 'very':3,5 'vocal':22 'wax':1 'wma':13,15,17 'wma32k':19
                                    'search_combo'  '1878':24 '1913':33 '1920':25 '32k':27,29,31 '9227':13C 'aa':1A 'amberol':11C,12C 'blue':10C 'clausen':8B 'cylinder':15,17 'cylindervery':19 'edison':9C 'kjoere':4A 'kjore':2A 'male':36 'old':20 'otto':7B 'prerock':34 'recordings':21,22,23 'vatten':3A 've':5A,6A 'very':16,18 'vocal':35 'wax':14 'wma':26,28,30 'wma32k':32
                                    '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-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['cylinder']
                                        'tag_date'  1913
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621625789.640782  (2021-05-21 21:36:29)
                             'size'  3593383