======================== unified (from filesystem) ========================
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                                        'duration'  '170'
                                          'artist'  'Hank Penny'
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                                           'title'  'Time Will Tell'
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                                      'lastfmtags'  "['classic country', 'country', 'hillbilly', 'western swing']"
                             'musicbrainz_albumid'  ''
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                            'musicbrainz_artistid'  ''
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                                     'tracknumber'  '17'
                                      'tracktotal'  '20'
                                            'date'  '1946'
                                        'comments'  ''
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rest: ''

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

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'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TDRC' (Recording time)                             '1946'
'TENC' (Encoded by)                                 'iTunes 10.6.3'
'TIT2' (Title/songname/content description)         'Time Will Tell'
'TKEY' (Initial key)                                '7B'
'TPE1' (Lead performer(s)/Soloist(s))               'Hank Penny'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '11/20'
'TRCK' (Track number/Position in set)               '17/20'
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'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['classic country', 'country', 'hillbilly', 'western swing']
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'TXXX:q-busy'                                       '2'
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'TXXX:q-drums'                                      '1'
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========================== row from database ==========================
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                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Vol 11/17. Hank Penny - Time Will Tell.mp3
                                         'working'  None
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                                    'duration_sec'  170
                                           'genre'  loc-namerica-country
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                                           'mtime'  1621628455
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                                       'tag_title'  Time Will Tell
                                             'bpm'  85.9
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                                   'search_artist'  'hank':1 'penny':2
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                                    'tag_tracknum'  17
                                      'num_images'  0
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['classic country', 'country', 'hillbilly', 'western swing']
                                        'tag_date'  1946
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621628454.8360264  (2021-05-21 22:20:54)
                             'size'  1370027