======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '174'
                                          'artist'  'Ella Fitzgerald'
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                                           'title'  "Organ Grinder's Swing"
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                                      'lastfmtags'  "['blues', 'jazz', 'female vocalists', 'jazz vocal', 'swing']"
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                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '12'
                                      'tracktotal'  '20'
                                            'date'  '1998'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-vocal'
                                             'bpm'  '143.925'
                                             'key'  '11A'
                                        'acoustid'  '78ada9fc-1a36-4daa-8186-ad0e12cb399f'
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
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'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-vocal'
'TDOR' (Original release time)                      '1998'
'TDRC' (Recording time)                             '1998'
'TIT2' (Title/songname/content description)         "Organ Grinder's Swing"
'TKEY' (Initial key)                                '11A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Ella Fitzgerald and Her Savoy Eight'
'TPE2' (Band/orchestra/accompaniment)               'Ella Fitzgerald'
'TPOS' (Part of a set)                              '1/2'
'TPUB' (Publisher)                                  'Retro'
'TRCK' (Track number/Position in set)               '12/20'
'TSO2'                                              'Fitzgerald, Ella'
'TSOP' (Performer sort order)                       'Fitzgerald, Ella and Her Savoy Eight'
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'TXXX:Acoustid Id'                                  '78ada9fc-1a36-4daa-8186-ad0e12cb399f'
'TXXX:Artists'                                      'Ella Fitzgerald and Her Savoy Eight'
'TXXX:BARCODE'                                      '076119401823'
'TXXX:CATALOGNUMBER'                                '94018'
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'TXXX:MusicBrainz Album Type'                       'album/compilation'
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'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:Tracknum'                                     '12'
'TXXX:lastfmtags'                                   ['blues', 'jazz', 'female vocalists', 'jazz vocal', 'swing']
'TXXX:originalyear'                                 '1998'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
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'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.00 dB'
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========================== row from database ==========================
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                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Fitzgerald, Ella/The Gold Collection/Ella Fitzgerald - Organ Grinder_s Swing - 12.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  174
                                           'genre'  prerock-jb-jazz-vocal
                                        'filesize'  2854720
                                           'mtime'  1620529005
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country Fitzgerald, The Grinder_s 12 prerock jb jazz vocal
                                      'tag_artist'  Ella Fitzgerald
                                     'tag_release'  Deja Vu Retro Gold Collection
                                       'tag_title'  Organ Grinder's Swing
                                             'bpm'  143.925
                                    'search_title'  'grinder':2 'grinders':4 'organ':1 's':3 'swing':5
                                   'search_artist'  'ella':1 'fitzgerald':2
                                  'search_release'  'collection':5 'deja':1 'gold':4 'retro':3 'vu':2
                                     'search_rest'  'country':4 'exotica':2 'fitzgerald':5,6 'grinder':8 'jazz':1 'jb':11 'oldies':3 'prerock':10 's':9 'the':7 'vocal':12
                                    'search_combo'  'collection':12C 'country':16 'deja':8C 'ella':6B 'exotica':14 'fitzgerald':7B,17,18 'gold':11C 'grinder':2A,20 'grinders':4A 'jazz':13 'jb':23 'oldies':15 'organ':1A 'prerock':22 'retro':10C 's':3A,21 'swing':5A 'the':19 'vocal':24 'vu':9C
                                    'tag_tracknum'  12
                                      'num_images'  1
                                             'key'  11A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['blues', 'jazz', 'female vocalists', 'jazz vocal', 'swing']
                                        'tag_date'  1998
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620529004.8473196  (2021-05-09 04:56:44)
                             'size'  2854720