======================== unified (from filesystem) ========================
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                                        'duration'  '423'
                                          'artist'  'Zino Francescatti, Robert Casadesus'
                                     'text_people'  'Beethoven, Ludwig van'
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                                           'title'  'Sonata for Violin and Piano #5, Op.24 "Spring" - 1st Movement'
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'TIT2' (Title/songname/content description)         'Sonata for Violin and Piano #5, Op.24 "Spring" - 1st Movement'
'TKEY' (Initial key)                                '7B'
'TPE1' (Lead performer(s)/Soloist(s))               'Zino Francescatti, Robert Casadesus'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
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'TXXX:Q-PIANO'                                      '4'
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========================== row from database ==========================
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                                           'genre'  prerock-classical or classical instruments;soundtrack-video
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                                       'tag_title'  Sonata for Violin and Piano #5, Op.24 "Spring" - 1st Movement
                                             'bpm'  146.0
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                                    'tag_tracknum'  7
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                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-4', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-3', 'Q-HAP-2', 'Q-PLAY-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['violin', 'piano', 'classical', 'nodame cantabile']
                                        'tag_date'  1961
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1637329781.9597437  (2021-11-19 14:49:41)
                             'size'  10214401