======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '247'
                                          'artist'  'Stock, Hausen & Walkman'
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                                         'release'  'Organ Transplants, Volume 2'
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                                      'lastfmtags'  "['electronica', 'avant garde', 'electronic', 'experimental', 'sound collage']"
                                     'discogstags'  "['electronic', 'experimental']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  '16'
                                            'date'  '2000'
                                        'comments'  ''
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======================== rawer (from filesystem) ========================

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'TBPM' (BPM (beats per minute))                     '90.010'
'TCON' (Content type, a.k.a. Genre)                 ['electronic-experimental-collage', 'set-pl-shirleyspinoza', 'set-pl-mor']
'TDOR' (Original release time)                      '2000'
'TDRC' (Recording time)                             '2000'
'TIT2' (Title/songname/content description)         'Deluxe'
'TKEY' (Initial key)                                '4A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Stock, Hausen & Walkman'
'TPE2' (Band/orchestra/accompaniment)               'Stock, Hausen & Walkman'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Hot Air'
'TRCK' (Track number/Position in set)               '4/16'
'TSO2'                                              'Stock, Hausen & Walkman'
'TSOP' (Performer sort order)                       'Stock, Hausen & Walkman'
'TXXX:Acoustid Id'                                  '0797d238-c1f7-42e9-bbc1-6356119f4d6c'
'TXXX:CATALOGNUMBER'                                'QRM CD 000'
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'TXXX:MusicBrainz Album Id'                         '55ed18f1-991b-4840-ae40-8adf3bb11b31'
'TXXX:MusicBrainz Album Release Country'            'GB'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        'f0abb8d6-fcf7-4d1e-8eae-1e615e266a5d'
'TXXX:MusicBrainz Release Group Id'                 '52332c78-fb8c-3c22-950e-d2373169a36b'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '3'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  ['electronic', 'experimental']
'TXXX:lastfmtags'                                   ['electronica', 'avant garde', 'electronic', 'experimental', 'sound collage']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-1.23 dB'
'TXXX:replaygain_track_peak'                        '0.600337'
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                                         'working'  None
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                                    'duration_sec'  247
                                           'genre'  electronic-experimental-collage;set-pl-shirleyspinoza;set-pl-mor
                                        'filesize'  5946313
                                           'mtime'  1623408501
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                                     'tag_release'  Organ Transplants, Volume 2
                                       'tag_title'  Deluxe
                                             'bpm'  90.01
                                    'search_title'  'deluxe':1
                                   'search_artist'  'hausen':3 'stock':1,2 'walkman':4
                                  'search_release'  '2':5 'organ':1 'transplants':2,3 'volume':4
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                                    'search_combo'  '0experimental':11 '2':10C '2000':22 'collage':25,27 'deluxe':1A 'electronic':23 'experimental':24 'hausen':4B,16 'mor':33 'organ':6C,18 'projects':13 'set':26,28,30,32 'shirleyspinoza':29,31 'sound':12 'stock':2B,3B,14,15 'transplants':7C,8C,19,20 'vol':21 'volume':9C 'walkman':5B,17
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  4A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-3', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-1', 'q-other-2', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['electronica', 'avant garde', 'electronic', 'experimental', 'sound collage']
                                        'tag_date'  2000
                                     'discogstags'  ['electronic', 'experimental']

============================== file details ==============================
                                           'mtime'  1623408501.1779149  (2021-06-11 12:48:21)
                             'size'  5946313