======================== unified (from filesystem) ========================
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                                        'duration'  '234'
                                          'artist'  'Isidor Achron'
                                     'text_people'  ''
                                         'release'  'Music from the Ether: Original Works for Theremin'
                                           'title'  'Improvisation'
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                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '6'
                                      'tracktotal'  '12'
                                            'date'  '1999'
                                        'comments'  ''
                                           'genre'  'mi-theremin'
                                             'bpm'  '130.4'
                                             'key'  '8A'
                                        'acoustid'  'c6f1c498-d55f-4a5b-a443-27c6013d8798'
rest: ''

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

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'TBPM' (BPM (beats per minute))                     '130.4'
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'TCON' (Content type, a.k.a. Genre)                 'mi-theremin'
'TDOR' (Original release time)                      '1999'
'TDRC' (Recording time)                             '1999'
'TENC' (Encoded by)                                 'iTunes v7.6.1'
'TIT2' (Title/songname/content description)         'Improvisation'
'TKEY' (Initial key)                                '8A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Isidor Achron'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Mode'
'TRCK' (Track number/Position in set)               '6/12'
'TSO2'                                              'Various Artists'
'TSOP' (Performer sort order)                       'Achron, Isidor'
'TXXX:Acoustid Id'                                  'c6f1c498-d55f-4a5b-a443-27c6013d8798'
'TXXX:CATALOGNUMBER'                                'mode 76'
'TXXX:MusicBrainz Album Artist Id'                  '89ad4ac3-39f7-470e-963a-56509c546377'
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'TXXX:MusicBrainz Album Type'                       'live'
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'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-PIANO'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
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'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
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========================== row from database ==========================
                                              'id'  772533
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Music From The Ether_ Original Works For Theremin/06 Improvisation.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  234
                                           'genre'  mi-theremin
                                        'filesize'  9405277
                                           'mtime'  1620527999
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm From Ether_ For 06 theremin
                                      'tag_artist'  Isidor Achron
                                     'tag_release'  Music from the Ether: Original Works for Theremin
                                       'tag_title'  Improvisation
                                             'bpm'  130.4
                                    'search_title'  'improvisation':1
                                   'search_artist'  'achron':2 'isidor':1
                                  'search_release'  'ether':4,5 'for':8 'from':2 'music':1 'original':6 'the':3 'theremin':9 'works':7
                                     'search_rest'  'ether':2 'for':3 'from':1 'theremin':4
                                    'search_combo'  'achron':3B 'ether':7C,8C,14 'for':11C,15 'from':5C,13 'improvisation':1A 'isidor':2B 'music':4C 'original':9C 'the':6C 'theremin':12C,16 'works':10C
                                    'tag_tracknum'  6
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-3', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-3', 'q-chart-1', 'q-other-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1999
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620527998.9359424  (2021-05-09 04:39:58)
                             'size'  9405277