======================== unified (from filesystem) ========================
                                         'bitrate'  '194.168'
                                        'duration'  '163'
                                          'artist'  'Ella Fitzgerald'
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                                         'release'  'Best of Ella Fitzgerald: First Lady of Song'
                                           'title'  "'Deed I Do"
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                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '16'
                                      'tracktotal'  '16'
                                            'date'  '1994'
                                        'comments'  ''
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                                             'key'  '6A'
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======================== rawer (from filesystem) ========================

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'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-vocal'
'TDOR' (Original release time)                      '1994'
'TDRC' (Recording time)                             '1994'
'TIT2' (Title/songname/content description)         "'Deed I Do"
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Ella Fitzgerald'
'TPE2' (Band/orchestra/accompaniment)               'Ella Fitzgerald'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'PolyGram Records, Inc.'
'TRCK' (Track number/Position in set)               '16/16'
'TSO2'                                              'Fitzgerald, Ella'
'TSOP' (Performer sort order)                       'Fitzgerald, Ella'
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'TXXX:Artists'                                      'Ella Fitzgerald'
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'TXXX:MusicBrainz Album Id'                         '7b97bdd2-8733-4dc9-a663-e82367395693'
'TXXX:MusicBrainz Album Release Country'            'DE'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album/compilation'
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'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:lastfmtags'                                   ['blues', 'jazz', 'female vocalists', 'jazz vocal', 'swing']
'TXXX:originalyear'                                 '1994'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.00 dB'
'TXXX:replaygain_track_peak'                        '0.472823'
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========================== row from database ==========================
                                              'id'  1509585
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Fitzgerald, Ella/First Lady of Song/Ella Fitzgerald - _Deed I Do.mp3
                                         'working'  None
                                         'bitrate'  194
                                    'duration_sec'  163
                                           'genre'  prerock-jb-jazz-vocal
                                        'filesize'  3980048
                                           'mtime'  1620528886
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country Fitzgerald, _Deed prerock jb jazz vocal
                                      'tag_artist'  Ella Fitzgerald
                                     'tag_release'  Best of Ella Fitzgerald: First Lady of Song
                                       'tag_title'  'Deed I Do
                                             'bpm'  117.398
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                                   'search_artist'  'ella':1 'fitzgerald':2
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                                     'search_rest'  'country':4 'deed':7 'exotica':2 'fitzgerald':5,6 'jazz':1 'jb':9 'oldies':3 'prerock':8 'vocal':10
                                    'search_combo'  'best':7C 'country':18 'deed':1A,2A,21 'do':4A 'ella':5B,9C 'exotica':16 'first':12C 'fitzgerald':6B,10C,11C,19,20 'i':3A 'jazz':15 'jb':23 'lady':13C 'of':8C 'oldies':17 'prerock':22 'song':14C 'vocal':24
                                    'tag_tracknum'  16
                                      'num_images'  1
                                             'key'  6A
                                           '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-3', 'q-syn-1', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['blues', 'jazz', 'female vocalists', 'jazz vocal', 'swing']
                                        'tag_date'  1994
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620528885.5964394  (2021-05-09 04:54:45)
                             'size'  3980048