======================== unified (from filesystem) ========================
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                                        'duration'  '171'
                                          'artist'  'Flanders and Swann'
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                                      'tracktotal'  ''
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                                        'comments'  ''
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                                             'bpm'  '85.851'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================

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'TBPM' (BPM (beats per minute))                     '85.851'
'TCON' (Content type, a.k.a. Genre)                 'entertaining-comedians'
'TDRC' (Recording time)                             '1964'
'TIT2' (Title/songname/content description)         'A Song of Patriotic Prejudice'
'TKEY' (Initial key)                                '7A'
'TPE1' (Lead performer(s)/Soloist(s))               'Flanders and Swann'
'TRCK' (Track number/Position in set)               '13'
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'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '2'
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'TXXX:lastfmtags'                                   ['english', 'comedy', 'british', 'humour', 'word play']
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'TXXX:q-drums'                                      '1'
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'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.44 dB'
'TXXX:replaygain_track_peak'                        '0.594932'

========================== row from database ==========================
                                              'id'  1292324
                                            'path'  /data/Music/Bulk/00spent/Flanders & Swann/At the Drop Of Another Hat/2-13 A Song Of Patriotic Prejudice.mp3
                                         'working'  None
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                                    'duration_sec'  171
                                           'genre'  entertaining-comedians
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                                           'mtime'  1620647275
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                                     'tag_release'  At the Drop of Another Hat
                                       'tag_title'  A Song of Patriotic Prejudice
                                             'bpm'  85.851
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                                    'tag_tracknum'  13
                                      'num_images'  0
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-mixbeat-1', 'Q-PIANO-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'Q-PLAY-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['english', 'comedy', 'british', 'humour', 'word play']
                                        'tag_date'  1964
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620647275.2659833  (2021-05-10 13:47:55)
                             'size'  4115107