======================== unified (from filesystem) ========================
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                                        'duration'  '270'
                                          'artist'  'Jason Mraz'
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                                           'title'  'No Doubling Back'
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                                      'lastfmtags'  "['acoustic', 'alternative', 'rock', 'pop', 'singer songwriter']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  '15'
                                            'date'  '2004'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter-pop'
                                             'bpm'  '114'
                                             'key'  '11B'
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rest: ''

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

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'TDOR' (Original release time)                      '2004'
'TDRC' (Recording time)                             '2004-08-24'
'TIT2' (Title/songname/content description)         'No Doubling Back'
'TKEY' (Initial key)                                '11B'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Jason Mraz'
'TPE2' (Band/orchestra/accompaniment)               'Jason Mraz'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Elektra Entertainment'
'TRCK' (Track number/Position in set)               '4/15'
'TSO2'                                              'Mraz, Jason'
'TSOP' (Performer sort order)                       'Mraz, Jason'
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'TXXX:Acoustid Id'                                  'f4e54f50-d6b0-4bb9-aa6a-66b0db69118b'
'TXXX:Artists'                                      'Jason Mraz'
'TXXX:BARCODE'                                      '075596293624'
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'TXXX:MusicBrainz Album Release Country'            'US'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album/live'
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'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:lastfmtags'                                   ['acoustic', 'alternative', 'rock', 'pop', 'singer songwriter']
'TXXX:originalyear'                                 '2004'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.01 dB'
'TXXX:replaygain_track_peak'                        '0.414735'
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========================== row from database ==========================
                                              'id'  203074
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/Jason Mraz/(Jason Mraz) - 07 - Tonight, Not Again - Live At The Eagles Ballroom/04 - No Doubling Back.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  270
                                           'genre'  ifs-songwriter-pop
                                        'filesize'  5494136
                                           'mtime'  1620645764
                                   'redo_metaread'  0
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                                      'tag_artist'  Jason Mraz
                                     'tag_release'  Tonight Not Again: Jason Mraz Live at the Eagles Ballroom
                                       'tag_title'  No Doubling Back
                                             'bpm'  114.0
                                    'search_title'  'back':3 'doubling':2 'no':1
                                   'search_artist'  'jason':1 'mraz':2
                                  'search_release'  'again':3,4 'at':8 'ballroom':11 'eagles':10 'jason':5 'live':7 'mraz':6 'not':2 'the':9 'tonight':1
                                     'search_rest'  '00singer':1 'at':10 'eos':3 'ifs':12 'jason':4,5 'mraz':6,7 'pop':13 'songwriter':2 'the':11 'tonight':8,9
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                                    'tag_tracknum'  4
                                      'num_images'  1
                                             'key'  11B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['acoustic', 'alternative', 'rock', 'pop', 'singer songwriter']
                                        'tag_date'  2004
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620645763.9854066  (2021-05-10 13:22:43)
                             'size'  5494136