======================== unified (from filesystem) ========================
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                                        'duration'  '150'
                                          'artist'  'Scientist'
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                                      'lastfmtags'  "['reggae', 'jamaica', 'dub', 'dub reggae', 'vule', 'psychedelic']"
                                     'discogstags'  "['dub']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
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                                      'tracktotal'  '18'
                                            'date'  '2011'
                                        'comments'  ''
                                           'genre'  'loc-style-reggae or dub or ska or dancehall-dub'
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                                             'key'  '7B'
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rest: ''

======================== rawer (from filesystem) ========================

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'TBPM' (BPM (beats per minute))                     '101.2'
'TCON' (Content type, a.k.a. Genre)                 'loc-style-reggae or dub or ska or dancehall-dub'
'TDOR' (Original release time)                      '2011'
'TDRC' (Recording time)                             '2011'
'TENC' (Encoded by)                                 'VBR'
'TIT2' (Title/songname/content description)         'Goodtime'
'TKEY' (Initial key)                                '7B'
'TLAN' (Language(s))                                'English'
'TPE1' (Lead performer(s)/Soloist(s))               'Scientist'
'TPE2' (Band/orchestra/accompaniment)               'Scientist'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Jamaican Recordings'
'TRCK' (Track number/Position in set)               '7/18'
'TSO2'                                              'Scientist'
'TSOP' (Performer sort order)                       'Scientist'
'TSSE' (Software/Hardware and settings used for encoding)  'Lavf52.54.0'
'TXXX:Acoustid Id'                                  'bfa6e620-8a46-474f-bd75-d70f1d126711'
'TXXX:Artists'                                      'Scientist'
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'TXXX:MusicBrainz Album Id'                         'af627846-6807-4b76-a6d2-0eed0bcf7505'
'TXXX:MusicBrainz Album Status'                     'bootleg'
'TXXX:MusicBrainz Album Type'                       'album'
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'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '2'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:TYER'                                         '2011'
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'TXXX:lastfmtags'                                   ['reggae', 'jamaica', 'dub', 'dub reggae', 'vule', 'psychedelic']
'TXXX:originalyear'                                 '2011'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.57 dB'
'TXXX:replaygain_track_peak'                        '0.366470'
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========================== row from database ==========================
                                              'id'  1386759
                                            'path'  /data/Music/Bulk/00localcharacter/00reggae-dub/Scientist Meets The Crazy Mad Professor At The Channel One Studio 2011/7 - Goodtime.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  150
                                           'genre'  loc-style-reggae or dub or ska or dancehall-dub
                                        'filesize'  4813515
                                           'mtime'  1620522219
                                   'redo_metaread'  0
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                                      'tag_artist'  Scientist
                                     'tag_release'  Scientist Meets the Crazy Mad Professor At Channel One
                                       'tag_title'  Goodtime
                                             'bpm'  101.2
                                    'search_title'  'goodtime':1
                                   'search_artist'  'scientist':1
                                  'search_release'  'at':7 'channel':8 'crazy':4 'mad':5 'meets':2 'one':9 'professor':6 'scientist':1 'the':3
                                     'search_rest'  '00reggae':1 '2011':5 '7':6 'dancehall':11 'dub':2 'loc':7 'reggae':9 'ska':10 'studio':4 'style':8 'the':3
                                    'search_combo'  '00reggae':12 '2011':16 '7':17 'at':9C 'channel':10C 'crazy':6C 'dancehall':22 'dub':13 'goodtime':1A 'loc':18 'mad':7C 'meets':4C 'one':11C 'professor':8C 'reggae':20 'scientist':2B,3C 'ska':21 'studio':15 'style':19 'the':5C,14
                                    'tag_tracknum'  7
                                      'num_images'  0
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-2', 'q-vocals-1', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-2', 'Q-JZFKS-3', 'q-busy-2', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['reggae', 'jamaica', 'dub', 'dub reggae', 'vule', 'psychedelic']
                                        'tag_date'  2011
                                     'discogstags'  ['dub']

============================== file details ==============================
                                           'mtime'  1620522219.4892056  (2021-05-09 03:03:39)
                             'size'  4813515