======================== unified (from filesystem) ========================
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                                        'duration'  '321'
                                          'artist'  'Van Halen'
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                                      'lastfmtags'  "['80s', 'heavy metal', 'rock', 'hard rock', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
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                                      'tracktotal'  '18'
                                            'date'  '2009'
                                        'comments'  ''
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======================== rawer (from filesystem) ========================

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'TDOR' (Original release time)                      '1996'
'TDRC' (Recording time)                             '2009-04-01'
'TIT2' (Title/songname/content description)         'Poundcake'
'TKEY' (Initial key)                                '12B'
'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)               '13/18'
'TSO2'                                              'Van Halen'
'TSOP' (Performer sort order)                       'Van Halen'
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'TXXX:MusicBrainz Album Artist Id'                  'b665b768-0d83-4363-950c-31ed39317c15'
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'TXXX:MusicBrainz Album Release Country'            'JP'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'compilation'
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'TXXX:Q-JZFKS'                                      '1'
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'TXXX:Q-UNU'                                        '2'
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'TXXX:lastfmtags'                                   ['80s', 'heavy metal', 'rock', 'hard rock', 'classic rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
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'TXXX:q-other'                                      '3'
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'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
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'TXXX:replaygain_track_peak'                        '0.461079'
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========================== row from database ==========================
                                              'id'  1322592
                                            'path'  /data/Music/Bulk/00poprockelectronic/van Halen/Van Halen - 12 - Poundcake.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  321
                                           'genre'  rock-gr-hard
                                        'filesize'  5145920
                                           'mtime'  1636902753
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic van 12 rock gr hard
                                      'tag_artist'  Van Halen
                                     'tag_release'  Best Of, Volume 1
                                       'tag_title'  Poundcake
                                             'bpm'  104.822
                                    'search_title'  'poundcake':1
                                   'search_artist'  'halen':2 'van':1
                                  'search_release'  '1':5 'best':1 'of':2,3 'volume':4
                                     'search_rest'  '00poprockelectronic':1 'gr':4 'hard':5 'rock':3 'van':2
                                    'search_combo'  '00poprockelectronic':9 '1':8C 'best':4C 'gr':12 'halen':3B 'hard':13 'of':5C,6C 'poundcake':1A 'rock':11 'van':2B,10 'volume':7C
                                    'tag_tracknum'  13
                                      'num_images'  0
                                             'key'  12B
                                           '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-4', 'q-syn-2', 'q-chart-3', 'q-other-3', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['80s', 'heavy metal', 'rock', 'hard rock', 'classic rock']
                                        'tag_date'  2009
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636902753.006956  (2021-11-14 16:12:33)
                             'size'  5145920