======================== unified (from filesystem) ========================
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'albumartistsort'                                   'Mulero, Oscar'
'artist'                                            'Oscar Mulero'
'artistsort'                                        'Mulero, Oscar'
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'catalognumber'                                     'Polegroup031CD'
'date'                                              '2015-04-20'
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'discogstags'                                       'electronic'
'discsubtitle'                                      'Muscle and Mind'
'disctotal'                                         '2'
'genre'                                             'electronic-th-techno-minimal or deephouse'
'key'                                               '1A'
'label'                                             'Pole Recordings'
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'q-vocals'                                          '1'
'releasecountry'                                    'ES'
'releasestatus'                                     'official'
'releasetype'                                       'album'
'replaygain_track_gain'                             '-9.40 dB'
'replaygain_track_peak'                             '1.155318'
'script'                                            'Latn'
'title'                                             'Mechanical Function'
'tracknumber'                                       '9'
'tracktotal'                                        '12'

========================== row from database ==========================
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                                         'working'  None
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                                    'duration_sec'  376
                                           'genre'  electronic-th-techno-minimal or deephouse
                                        'filesize'  11088043
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                                       'tag_title'  Mechanical Function
                                             'bpm'  120.974
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                                    'tag_tracknum'  9
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['q-mixbeat-3', 'q-chart-2', 'q-other-1', 'q-oldst-3', 'q-grit-2', 'q-vocals-1', 'q-drums-4', 'q-busy-3', 'q-localness-1', 'q-jzfks-1', 'q-hhrnbtt-1', 'q-syn-4', 'q-piano-1', 'q-play-3', 'q-bass-1', 'q-hap-2', 'q-unu-1']
                                      'lastfmtags'  ['minimal techno', 'techno', 'electronic', 'minimal', 'hard techno']
                                        'tag_date'  2015
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1621085171.116248  (2021-05-15 15:26:11)
                             'size'  11088043