======================== unified (from filesystem) ========================
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                             'musicbrainz_albumid'  ''
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                                      'tracktotal'  '10'
                                            'date'  '2007'
                                        'comments'  ''
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======================== rawer (from filesystem) ========================

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'TDRC' (Recording time)                             '2007-09-25'
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'TPE1' (Lead performer(s)/Soloist(s))               'The Cave Singers'
'TPE2' (Band/orchestra/accompaniment)               'The Cave Singers'
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'TPUB' (Publisher)                                  'Matador'
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'TSO2'                                              'Cave Singers, The'
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                                            'path'  /data/Music/Bulk/00poprockelectronic-poprock-indierock/Invitation Songs/04 Cold Eye.mp3
                                         'working'  None
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                                           'genre'  ifs-songwriter-folk
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                                    'tag_tracknum'  4
                                      'num_images'  1
                                             'key'  10B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['bagel', 'lo fi', 'indie folk', 'americana', 'folk']
                                        'tag_date'  2007
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1636400701.185736  (2021-11-08 20:45:01)
                             'size'  6962042