======================== unified (from filesystem) ========================
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                                        'duration'  '219'
                                          'artist'  'Sarah Vaughan'
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                                           'title'  'It Never Entered My Mind'
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                                      'lastfmtags'  "['vocal jazz', 'jazz vocal', 'jazz', 'female vocalists', 'blues']"
                                     'discogstags'  "['jazz', 'bop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '9'
                                      'tracktotal'  '18'
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-vocal'
                                             'bpm'  '145.685'
                                             'key'  '3B'
                                        'acoustid'  '68c792e3-aa4d-4972-86f8-ca19e14c70cd'
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:CDDB Disc ID:XXX'                             '0A0E9112'
'COMM:ID3v1 Comment:XXX'                            '0A0E9112'
'TALB' (Album/Movie/Show title)                     "Sarah Vaughan's Finest Hour"
'TBPM' (BPM (beats per minute))                     '145.685'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-vocal'
'TDOR' (Original release time)                      '2000'
'TDRC' (Recording time)                             '2000-06-13'
'TIT2' (Title/songname/content description)         'It Never Entered My Mind'
'TKEY' (Initial key)                                '3B'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Sarah Vaughan'
'TPE2' (Band/orchestra/accompaniment)               'Sarah Vaughan'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Verve'
'TRCK' (Track number/Position in set)               '9/18'
'TSO2'                                              'Vaughan, Sarah'
'TSOP' (Performer sort order)                       'Vaughan, Sarah'
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'TXXX:ASIN'                                         'B00004ST4V'
'TXXX:Acoustid Id'                                  '68c792e3-aa4d-4972-86f8-ca19e14c70cd'
'TXXX:Artists'                                      'Sarah Vaughan'
'TXXX:BARCODE'                                      '731454359726'
'TXXX:CATALOGNUMBER'                                '3145435972'
'TXXX:MusicBrainz Album Artist Id'                  '351d8bdf-33a1-45e2-8c04-c85fad20da55'
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'TXXX:MusicBrainz Album Type'                       'album/compilation'
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'TXXX:MusicBrainz Release Track Id'                 '6582065d-5165-3ee7-868f-23b99642adfe'
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'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  ['jazz', 'bop']
'TXXX:lastfmtags'                                   ['vocal jazz', 'jazz vocal', 'jazz', 'female vocalists', 'blues']
'TXXX:originalyear'                                 '2000'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
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'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.52 dB'
'TXXX:replaygain_track_peak'                        '0.466587'
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========================== row from database ==========================
                                              'id'  1531677
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Vaughan, Sarah/Sarah Vaughan_s Finest Hour/Sarah Vaughan - It Never Entered my Mind - 09.mp3
                                         'working'  None
                                         'bitrate'  153
                                    'duration_sec'  219
                                           'genre'  prerock-jb-jazz-vocal
                                        'filesize'  4221588
                                           'mtime'  1620537130
                                   'redo_metaread'  0
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                                      'tag_artist'  Sarah Vaughan
                                     'tag_release'  Sarah Vaughan's Finest Hour
                                       'tag_title'  It Never Entered My Mind
                                             'bpm'  145.685
                                    'search_title'  'entered':3 'it':1 'mind':5 'my':4 'never':2
                                   'search_artist'  'sarah':1 'vaughan':2
                                  'search_release'  'finest':5 'hour':6 's':3 'sarah':1 'vaughan':2 'vaughans':4
                                     'search_rest'  'country':4 'exotica':2 'jazz':1 'jb':11 'my':9 'oldies':3 'prerock':10 's':8 'vaughan':5,6,7 'vocal':12
                                    'search_combo'  'country':17 'entered':3A 'exotica':15 'finest':12C 'hour':13C 'it':1A 'jazz':14 'jb':24 'mind':5A 'my':4A,22 'never':2A 'oldies':16 'prerock':23 's':10C,21 'sarah':6B,8C 'vaughan':7B,9C,18,19,20 'vaughans':11C 'vocal':25
                                    'tag_tracknum'  9
                                      'num_images'  1
                                             'key'  3B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['vocal jazz', 'jazz vocal', 'jazz', 'female vocalists', 'blues']
                                        'tag_date'  2000
                                     'discogstags'  ['jazz', 'bop']

============================== file details ==============================
                                           'mtime'  1620537130.1841006  (2021-05-09 07:12:10)
                             'size'  4221588