======================== unified (from filesystem) ========================
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                                        'duration'  '66'
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                                             'key'  '6A'
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======================== rawer (from filesystem) ========================

'album'                                             'Psychedelic Promos Radio Spots Vol. 6'
'artist'                                            'Tom MaCans Shoes The Dutchess (Carnaby Street version) 9766'
'bpm'                                               '88.207'
'comment'                                           'http://archive.org/details/PsychedelicPromosRadioSpotsVol.6'
'crc32'                                             '25cc0ec0'
'date'                                              '1970'
'encoder'                                           ['Lavc55.68.101 libvorbis', 'Lavf55.45.100']
'format'                                            'VBR MP3'
'genre'                                             'nonmusic-commercials'
'height'                                            '0'
'key'                                               '6A'
'length'                                            '66.25'
'md5'                                               'a50b3c62cd0db3d36e848495e1a3f43b'
'mtime'                                             '1407599149'
'q-bass'                                            '4'
'q-busy'                                            '3'
'q-chart'                                           '1'
'q-drums'                                           '3'
'q-grit'                                            '1'
'q-hap'                                             '3'
'q-hhrnbtt'                                         '1'
'q-jzfks'                                           '1'
'q-localness'                                       '1'
'q-mixbeat'                                         '1'
'q-oldst'                                           '2'
'q-other'                                           '1'
'q-piano'                                           '1'
'q-play'                                            '2'
'q-syn'                                             '2'
'q-unu'                                             '1'
'q-vocals'                                          '3'
'replaygain_track_gain'                             '-4.49 dB'
'replaygain_track_peak'                             '1.021266'
'sha1'                                              '869ac4d46a23c66f3691edfb949bd464148f3ec7'
'size'                                              '2650905'
'source'                                            'original'
'title'                                             'Tom MaCans Shoes The Dutchess (Carnaby Street version) 9766'
'tracknum'                                          '59'
'width'                                             '0'

========================== row from database ==========================
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                                    'duration_sec'  66
                                           'genre'  nonmusic-commercials
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                                      'tag_artist'  Tom MaCans Shoes The Dutchess (Carnaby Street version) 9766
                                     'tag_release'  Psychedelic Promos Radio Spots Vol. 6
                                       'tag_title'  Tom MaCans Shoes The Dutchess (Carnaby Street version) 9766
                                             'bpm'  88.207
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                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['q-mixbeat-1', 'q-chart-1', 'q-oldst-2', 'q-grit-1', 'q-hap-3', 'q-drums-3', 'q-busy-3', 'q-localness-1', 'q-jzfks-1', 'q-hhrnbtt-1', 'q-syn-2', 'q-piano-1', 'q-play-2', 'q-other-1', 'q-bass-4', 'q-vocals-3', 'q-unu-1']
                                      'lastfmtags'  []
                                        'tag_date'  1970
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620525963.597225  (2021-05-09 04:06:03)
                             'size'  651577