======================== unified (from filesystem) ========================
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                                      'tracktotal'  '11'
                                            'date'  '2005'
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'TCON' (Content type, a.k.a. Genre)                 'rock-gr-hard'
'TDOR' (Original release time)                      '2004'
'TDRC' (Recording time)                             '2005-03-29'
'TIT2' (Title/songname/content description)         'The Clincher'
'TKEY' (Initial key)                                '6B'
'TMED' (Media type)                                 'DualDisc'
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'TPE2' (Band/orchestra/accompaniment)               'Chevelle'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Epic'
'TRCK' (Track number/Position in set)               '1/11'
'TSO2'                                              'Chevelle'
'TSOP' (Performer sort order)                       'Chevelle'
'TSRC' (ISRC (international standard recording code))  'USSM10410119'
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'TXXX:Artists'                                      'Chevelle'
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'TXXX:Q-LOCALNESS'                                  '1'
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'TXXX:lastfmtags'                                   ['alternative rock', 'alternative metal', 'rock', 'alternative', 'hard rock']
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'TXXX:q-chart'                                      '4'
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========================== row from database ==========================
                                              'id'  1337494
                                            'path'  /data/Music/Bulk/00dwimp/Chevelle/This Type Of Thinking (Could Do Us In)/01 - The Clincher.mp3
                                         'working'  None
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                                    'duration_sec'  223
                                           'genre'  rock-gr-hard
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                                           'mtime'  1636902802
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                                       'tag_title'  The Clincher
                                             'bpm'  117.1
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                                   'search_artist'  'chevelle':1
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                                    'tag_tracknum'  1
                                      'num_images'  1
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['alternative rock', 'alternative metal', 'rock', 'alternative', 'hard rock']
                                        'tag_date'  2005
                                     'discogstags'  ['electronic', 'garage house']

============================== file details ==============================
                                           'mtime'  1636902802.005141  (2021-11-14 16:13:22)
                             'size'  5419170