======================== unified (from filesystem) ========================
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                                        'duration'  '129'
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                            'musicbrainz_artistid'  ''
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                                      'tracktotal'  ''
                                            'date'  '2001'
                                        'comments'  ''
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rest: ''

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

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'TCON' (Content type, a.k.a. Genre)                 'hip hop or rnb or rap or turntablism'
'TDRC' (Recording time)                             '2001'
'TIT2' (Title/songname/content description)         'Back in Time'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Prefuse 73'
'TRCK' (Track number/Position in set)               '11'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '3'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'electronic'
'TXXX:lastfmtags'                                   ['electronica', 'trip hop', 'idm', 'electronic', 'hip hop']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
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'TXXX:q-drums'                                      '4'
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'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '1'
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'TXXX:replaygain_track_peak'                        '0.524033'

========================== row from database ==========================
                                              'id'  1423498
                                            'path'  /data/Music/Bulk/00popandrock-hiphop-rap-rnb-turntablism/Prefuse 73/Vocal Studies & Uprock Narratives/Prefuse 73 - Vocal Studies & Uprock Narratives - 11 - Back In Time.mp3
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                                           'genre'  hip hop or rnb or rap or turntablism
                                        'filesize'  3253243
                                           'mtime'  1620592410
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                                       'tag_title'  Back in Time
                                             'bpm'  91.021
                                    'search_title'  'back':1 'in':2 'time':3
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                                    'tag_tracknum'  11
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-3', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-3', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-3', 'q-chart-3', 'q-other-2', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['electronica', 'trip hop', 'idm', 'electronic', 'hip hop']
                                        'tag_date'  2001
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1620592409.681401  (2021-05-09 22:33:29)
                             'size'  3253243