======================== unified (from filesystem) ========================
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                                        'duration'  '217'
                                          'artist'  'Death Angel'
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                                           'title'  'Land of Blood'
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                                      'lastfmtags'  "['thrash', 'speed metal', 'thrash metal', 'metal', 'heavy metal']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '9'
                                      'tracktotal'  '11'
                                            'date'  '2004'
                                        'comments'  ''
                                           'genre'  'eid-metal-speedmetal'
                                             'bpm'  '142.008'
                                             'key'  '11A'
                                        'acoustid'  '5b5d5a70-bedb-4c70-8999-3d1e1c809c97'
rest: ''

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'TDOR' (Original release time)                      '2004'
'TDRC' (Recording time)                             '2004-04-26'
'TIT2' (Title/songname/content description)         'Land of Blood'
'TKEY' (Initial key)                                '11A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Death Angel'
'TPE2' (Band/orchestra/accompaniment)               'Death Angel'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Nuclear Blast'
'TRCK' (Track number/Position in set)               '9/11'
'TSO2'                                              'Death Angel'
'TSOP' (Performer sort order)                       'Death Angel'
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'TXXX:MusicBrainz Album Release Country'            'DE'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
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'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:lastfmtags'                                   ['thrash', 'speed metal', 'thrash metal', 'metal', 'heavy metal']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
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'TXXX:q-grit'                                       '4'
'TXXX:q-mixbeat'                                    '1'
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'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
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'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.58 dB'
'TXXX:replaygain_track_peak'                        '0.344901'
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========================== row from database ==========================
                                              'id'  1349334
                                            'path'  /data/Music/Bulk/00poprockelectronic/Death Angel/The art of dying/10 - land of blood.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  217
                                           'genre'  eid-metal-speedmetal
                                        'filesize'  5214941
                                           'mtime'  1620311693
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic art dying 10 land blood eid metal speedmetal
                                      'tag_artist'  Death Angel
                                     'tag_release'  The Art of Dying
                                       'tag_title'  Land of Blood
                                             'bpm'  142.008
                                    'search_title'  'blood':3 'land':1 'of':2
                                   'search_artist'  'angel':2 'death':1
                                  'search_release'  'art':2 'dying':4 'of':3 'the':1
                                     'search_rest'  '00poprockelectronic':1 'art':2 'blood':5 'dying':3 'eid':6 'land':4 'metal':7 'speedmetal':8
                                    'search_combo'  '00poprockelectronic':10 'angel':5B 'art':7C,11 'blood':3A,14 'death':4B 'dying':9C,12 'eid':15 'land':1A,13 'metal':16 'of':2A,8C 'speedmetal':17 'the':6C
                                    'tag_tracknum'  9
                                      'num_images'  0
                                             'key'  11A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-1', 'q-bass-2', 'q-grit-4']
                                      'lastfmtags'  ['thrash', 'speed metal', 'thrash metal', 'metal', 'heavy metal']
                                        'tag_date'  2004
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620311692.707661  (2021-05-06 16:34:52)
                             'size'  5214941