======================== unified (from filesystem) ========================
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                                        'duration'  '164'
                                          'artist'  'The Bagelman Sisters & Abe Ellstein Orchestra'
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                                           'title'  'A Vaibele, A Tsien'
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                                     'tracknumber'  '19'
                                      'tracktotal'  '20'
                                            'date'  '1930'
                                        'comments'  ''
                                           'genre'  'loc-style-gypsy or balkan or klezmer'
                                             'bpm'  '99'
                                             'key'  '9A'
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======================== rawer (from filesystem) ========================

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'TCON' (Content type, a.k.a. Genre)                 'loc-style-gypsy or balkan or klezmer'
'TDOR' (Original release time)                      '2004'
'TDRC' (Recording time)                             '1930'
'TIT2' (Title/songname/content description)         'A Vaibele, A Tsien'
'TKEY' (Initial key)                                '9A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'The Bagelman Sisters & Abe Ellstein Orchestra'
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'TPOS' (Part of a set)                              '1/4'
'TPUB' (Publisher)                                  'Documents'
'TRCK' (Track number/Position in set)               '19/20'
'TSO2'                                              'Various Artists'
'TSOP' (Performer sort order)                       'Barry Sisters, The & Ellstein, Abe, Orchestra'
'TSRC' (ISRC (international standard recording code))  'DEU240307125'
'TXXX:ASIN'                                         'B0002KP5VM'
'TXXX:Artists'                                      'The Bagelman Sisters/Abe Ellstein Orchestra'
'TXXX:BARCODE'                                      '4011222220479'
'TXXX:CATALOGNUMBER'                                '222047'
'TXXX:LABEL'                                        'Membran International GmbH'
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                                            'path'  /data/Music/Bulk/00localcharacter/2004 - Yiddish Songs (Traditionals - 1911-1950)/1.19. A Vaibele, A Tsien (The Bagelman Sisters & Abe Ellstein Orchestra).mp3
                                         'working'  None
                                         'bitrate'  158
                                    'duration_sec'  164
                                           'genre'  loc-style-gypsy or balkan or klezmer
                                        'filesize'  3284314
                                           'mtime'  1643982345
                                   'redo_metaread'  0
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                                      'tag_artist'  The Bagelman Sisters & Abe Ellstein Orchestra
                                     'tag_release'  Yiddish Songs: Traditionals (1911-1950)
                                       'tag_title'  A Vaibele, A Tsien
                                             'bpm'  99.0
                                    'search_title'  'a':1 'tsien':4 'vaibele':2,3
                                   'search_artist'  'abe':4 'bagelman':2 'ellstein':5 'orchestra':6 'sisters':3 'the':1
                                  'search_release'  '1911':5 '19111950':7 '1950':6 'songs':2,3 'traditionals':4 'yiddish':1
                                     'search_rest'  '1':4 '119':6 '19':5 '2004':1 'balkan':15 'gypsy':13 'klezmer':16 'loc':11 'or':14 'orchestra':9,10 'style':12 'the':7,8 'traditionals':2,3
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                                    'tag_tracknum'  19
                                      'num_images'  1
                                             'key'  9A
                                           'quals'  ['Q-BUSY-2', 'Q-HAP-3', 'Q-JZFKS-2', 'Q-UNU-2', 'Q-LOCALNESS-3', 'Q-HHRNBTT-1', 'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-grit-2', 'q-play-2', 'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-1']
                                      'lastfmtags'  []
                                        'tag_date'  1930
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1643982345.2776513  (2022-02-04 14:45:45)
                             'size'  3284314