======================== unified (from filesystem) ========================
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                                        'duration'  '166'
                                          'artist'  'Courtney Barnett'
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                                           'title'  "Nobody Really Cares If You Don't Go to the Party"
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                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
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                                      'tracktotal'  '11'
                                            'date'  '2015'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter'
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======================== rawer (from filesystem) ========================

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Sometimes I Sit and Think, and Sometimes I Just Sit'
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'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter'
'TDOR' (Original release time)                      '2015'
'TDRC' (Recording time)                             '2015-03-20'
'TIT2' (Title/songname/content description)         "Nobody Really Cares If You Don't Go to the Party"
'TKEY' (Initial key)                                '12B'
'TMED' (Media type)                                 'Digital Media'
'TPE1' (Lead performer(s)/Soloist(s))               'Courtney Barnett'
'TPE2' (Band/orchestra/accompaniment)               'Courtney Barnett'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Milk! Records'
'TRCK' (Track number/Position in set)               '8/11'
'TSO2'                                              'Barnett, Courtney'
'TSOP' (Performer sort order)                       'Barnett, Courtney'
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'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        '55111838-f001-494a-a1b5-9d818db85810'
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'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-1.73 dB'
'TXXX:replaygain_track_peak'                        '0.374939'

========================== row from database ==========================
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                                           'genre'  ifs-songwriter
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                                       'tag_title'  Nobody Really Cares If You Don't Go to the Party
                                             'bpm'  91.144
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                                    'tag_tracknum'  8
                                      'num_images'  1
                                             'key'  12B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-3', 'q-other-2', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['indie', 'australian', 'indie folk', 'folk', 'singer songwriter']
                                        'tag_date'  2015
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1637328807.9472222  (2021-11-19 14:33:27)
                             'size'  7193881