======================== unified (from filesystem) ========================
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                                        'duration'  '466'
                                          'artist'  'Marco Masoni'
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                                           'title'  'Franco Battiato Medley: Areknames / Fenomenologia / Plancton / Tao / Meccanica'
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                                     'discogstags'  "['alternative rock', 'pop', 'ballad', 'prog rock', 'rock']"
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                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
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                                      'tracktotal'  '12'
                                            'date'  '1997'
                                        'comments'  ''
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                                             'key'  '6B'
                                        'acoustid'  'ebdeb390-a84b-4021-9dbf-35bcf237b34d'
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======================== rawer (from filesystem) ========================

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'TBPM' (BPM (beats per minute))                     '136'
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'TCON' (Content type, a.k.a. Genre)                 ['rock-cppex-progressive', 'set-pl-progspace']
'TDOR' (Original release time)                      '1997'
'TDRC' (Recording time)                             '1997'
'TIT2' (Title/songname/content description)         'Franco Battiato Medley: Areknames / Fenomenologia / Plancton / Tao / Meccanica'
'TKEY' (Initial key)                                '6B'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Marco Masoni'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '2/4'
'TPUB' (Publisher)                                  'Mellow Records'
'TRCK' (Track number/Position in set)               '4/12'
'TSO2'                                              'Various Artists'
'TSOP' (Performer sort order)                       'Masoni, Marco'
'TXXX:Acoustid Id'                                  'ebdeb390-a84b-4021-9dbf-35bcf237b34d'
'TXXX:Artists'                                      'Marco Masoni'
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'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album/compilation'
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'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
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'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  ['alternative rock', 'pop', 'ballad', 'prog rock', 'rock']
'TXXX:originalyear'                                 '1997'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-1.44 dB'
'TXXX:replaygain_track_peak'                        '0.539914'
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========================== row from database ==========================
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                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/Algebra - Italian Prog Tribute/cd 2/Zarathustra_s_Revenge_-_Italian_Prog_Tribute_Box_Set_-_204_-_Marco_Masoni_(Italy)_-Franco_Battiato_Medley.mp3
                                         'working'  None
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                                    'duration_sec'  466
                                           'genre'  rock-cppex-progressive;set-pl-progspace
                                        'filesize'  14937748
                                           'mtime'  1620736019
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy Algebra Italian Prog Tribute cd 2 Zarathustra_s_Revenge_ _Italian_Prog_Tribute_Box_Set_ _204_ _Marco_Masoni_(Italy)_ Franco_Battiato_Medley rock cppex progressive;set pl progspace
                                      'tag_artist'  Marco Masoni
                                     'tag_release'  Zarathustra's Revenge
                                       'tag_title'  Franco Battiato Medley: Areknames / Fenomenologia / Plancton / Tao / Meccanica
                                             'bpm'  136.0
                                    'search_title'  'areknames':5 'battiato':2 'fenomenologia':6 'franco':1 'meccanica':9 'medley':3,4 'plancton':7 'tao':8
                                   'search_artist'  'marco':1 'masoni':2
                                  'search_release'  'revenge':4 's':2 'zarathustra':1 'zarathustras':3
                                     'search_rest'  '2':7 '204':16 'algebra':2 'battiato':24 'box':14 'cd':6 'classicprogpsy':1 'cppex':27 'franco':23 'italian':3,11 'italy':19,22 'marco':17,20 'masoni':18,21 'medley':25 'pl':32 'prog':4,12 'progressive':28,30 'progspace':33 'revenge':10 'rock':26 's':9 'set':15,29,31 'tribute':5,13 'zarathustra':8
                                    'search_combo'  '2':22 '204':31 'algebra':17 'areknames':5A 'battiato':2A,39 'box':29 'cd':21 'classicprogpsy':16 'cppex':42 'fenomenologia':6A 'franco':1A,38 'italian':18,26 'italy':34,37 'marco':10B,32,35 'masoni':11B,33,36 'meccanica':9A 'medley':3A,4A,40 'pl':47 'plancton':7A 'prog':19,27 'progressive':43,45 'progspace':48 'revenge':15C,25 'rock':41 's':13C,24 'set':30,44,46 'tao':8A 'tribute':20,28 'zarathustra':12C,23 'zarathustras':14C
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1997
                                     'discogstags'  ['alternative rock', 'pop', 'ballad', 'prog rock', 'rock']

============================== file details ==============================
                                           'mtime'  1620736019.224742  (2021-05-11 14:26:59)
                             'size'  14937748