======================== unified (from filesystem) ========================
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                                      'tracktotal'  '10'
                                            'date'  '1991'
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======================== rawer (from filesystem) ========================

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'TSO2'                                              'Various Artists'
'TSOP' (Performer sort order)                       'Sibelius, Jean'
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                                       'tag_title'  Kuolema, for Orchestra, Op. 44/1: Valse Triste
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                                    'tag_tracknum'  8
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                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-2', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['composers', 'instrumental', 'finnish', 'classical', 'romantic']
                                        'tag_date'  1991
                                     'discogstags'  ['classical']

============================== file details ==============================
                                           'mtime'  1620561811.981131  (2021-05-09 14:03:31)
                             'size'  6716493