======================== unified (from filesystem) ========================
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                                        'duration'  '252'
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                             'musicbrainz_albumid'  ''
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                                      'tracktotal'  '12'
                                            'date'  '2007'
                                        'comments'  ''
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                                             'bpm'  '132.012'
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                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
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'TCOM' (Composer)                                   'A.C. Newman'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter-indie-unsorted'
'TDRC' (Recording time)                             '2007'
'TENC' (Encoded by)                                 'iTunes v7.2'
'TIT2' (Title/songname/content description)         'Mutiny, I Promise You'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'The New Pornographers'
'TRCK' (Track number/Position in set)               '10/12'
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'TXXX:lastfmtags'                                   ['indie', 'indie pop', 'alternative', 'indie rock', 'canadian']
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========================== row from database ==========================
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                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/The New Pornographers/Challengers/Mutiny, I Promise You.mp3
                                         'working'  None
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                                    'duration_sec'  252
                                           'genre'  ifs-songwriter-indie-unsorted
                                        'filesize'  6320061
                                           'mtime'  1642256570
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                                       'tag_title'  Mutiny, I Promise You
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                                   'search_artist'  'new':2 'pornographers':3 'the':1
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                                      'lastfmtags'  ['indie', 'indie pop', 'alternative', 'indie rock', 'canadian']
                                        'tag_date'  2007
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1642256570.0257082  (2022-01-15 15:22:50)
                             'size'  6320061