======================== unified (from filesystem) ========================
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                                        'duration'  '338'
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                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
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                                      'tracktotal'  '18'
                                            'date'  '2009'
                                        'comments'  ''
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'TDOR' (Original release time)                      '1996'
'TDRC' (Recording time)                             '2009-04-01'
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'TKEY' (Initial key)                                '10B'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Van Halen'
'TPE2' (Band/orchestra/accompaniment)               'Van Halen'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Warner Bros. Records'
'TRCK' (Track number/Position in set)               '12/18'
'TSO2'                                              'Van Halen'
'TSOP' (Performer sort order)                       'Van Halen'
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'TXXX:lastfmtags'                                   ['80s', 'heavy metal', 'rock', 'hard rock', 'classic rock']
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'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
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'TXXX:q-piano'                                      '1'
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========================== row from database ==========================
                                              'id'  1518175
                                            'path'  /data/Music/Bulk/00poprockelectronic/van Halen/Van Halen - 11 - When It_s Love.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  338
                                           'genre'  rock-gr-hard;set-pl-billboard
                                        'filesize'  5425590
                                           'mtime'  1620392827
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic van 11 It_s rock gr hard;set pl billboard
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                                     'tag_release'  Best Of, Volume 1
                                       'tag_title'  When It's Love
                                             'bpm'  99.665
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                                   'search_artist'  'halen':2 'van':1
                                  'search_release'  '1':5 'best':1 'of':2,3 'volume':4
                                     'search_rest'  '00poprockelectronic':1 'billboard':12 'gr':6 'hard':7,9 'it':3 'pl':11 'rock':5 's':4 'set':8,10 'van':2
                                    'search_combo'  '00poprockelectronic':13 '1':12C 'best':8C 'billboard':24 'gr':18 'halen':7B 'hard':19,21 'it':2A,15 'its':4A 'love':5A 'of':9C,10C 'pl':23 'rock':17 's':3A,16 'set':20,22 'van':6B,14 'volume':11C 'when':1A
                                    'tag_tracknum'  12
                                      'num_images'  0
                                             'key'  10B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', '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-3', 'q-other-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['80s', 'heavy metal', 'rock', 'hard rock', 'classic rock']
                                        'tag_date'  2009
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620392827.1730192  (2021-05-07 15:07:07)
                             'size'  5425590