======================== unified (from filesystem) ========================
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                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  '18'
                                            'date'  '1980'
                                        'comments'  ''
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'TCON' (Content type, a.k.a. Genre)                 'electronic-we-new wave or post punk-minimal wave'
'TDRC' (Recording time)                             '1980'
'TIT2' (Title/songname/content description)         'Heart Finds a Home'
'TKEY' (Initial key)                                '2B'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Robert Lawrence'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Flexi-Pop'
'TRCK' (Track number/Position in set)               '2/18'
'TSO2'                                              'Various Artists'
'TSOP' (Performer sort order)                       'Lawrence, Robert'
'TXXX:Acoustid Id'                                  '3a6451f9-1d43-4fae-9c7c-0746104dd7b3'
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'TXXX:MusicBrainz Album Status'                     'bootleg'
'TXXX:MusicBrainz Album Type'                       'compilation'
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'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  ['electronic', 'minimal']
'TXXX:lastfmtags'                                   ['minimal synth', 'new wave']
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'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '3'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
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                                     'tag_release'  Return of Flexi-Pop, Volume 8
                                       'tag_title'  Heart Finds a Home
                                             'bpm'  90.1
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                                   'search_artist'  'lawrence':2 'robert':1
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                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  2B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-1', 'q-other-2', 'Q-HAP-2', 'q-bass-4', 'q-grit-3']
                                      'lastfmtags'  ['minimal synth', 'new wave']
                                        'tag_date'  1980
                                     'discogstags'  ['electronic', 'minimal']

============================== file details ==============================
                                           'mtime'  1620611369.127781  (2021-05-10 03:49:29)
                             'size'  6995789