======================== unified (from filesystem) ========================
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                                        'duration'  '328'
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                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '10'
                                      'tracktotal'  '11'
                                            'date'  '2003'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-beats'
                                             'bpm'  '135'
                                             'key'  '6B'
                                        'acoustid'  'e90766fb-4fb8-4e74-9977-0826c2c9d96c'
rest: ''

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'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-beats'
'TDOR' (Original release time)                      '2003'
'TDRC' (Recording time)                             '2003'
'TIT2' (Title/songname/content description)         'Under the Influence (mix 2)'
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'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'The Chemical Brothers'
'TPE2' (Band/orchestra/accompaniment)               'The Chemical Brothers'
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'TPUB' (Publisher)                                  "Freestyle Dust/Junior Boy's Own/Virgin"
'TRCK' (Track number/Position in set)               '10/11'
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'TSOP' (Performer sort order)                       'Chemical Brothers, The'
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'TXXX:MusicBrainz Artist Id'                        '1946a82a-f927-40c2-8235-38d64f50d043'
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'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  ['electronic', 'breakbeat', 'leftfield', 'big beat']
'TXXX:lastfmtags'                                   ['dance', 'electronica', 'techno', 'electronic', 'big beat']
'TXXX:originalyear'                                 '2003'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.24 dB'
'TXXX:replaygain_track_peak'                        '0.389843'
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========================== row from database ==========================
                                              'id'  1314216
                                            'path'  /data/Music/Bulk/00poprockelectronic/CD2/10. Under The Influence (Mix 2).mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  328
                                           'genre'  electronic-generic or radio-beats
                                        'filesize'  13229815
                                           'mtime'  1620568200
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic CD2 10. (Mix electronic generic or radio beats
                                      'tag_artist'  The Chemical Brothers
                                     'tag_release'  Singles 93-03
                                       'tag_title'  Under the Influence (mix 2)
                                             'bpm'  135.0
                                    'search_title'  '2':6,7 'influence':3 'mix':4,5 'the':2 'under':1
                                   'search_artist'  'brothers':3 'chemical':2 'the':1
                                  'search_release'  '03':3 '93':2 '9303':4 'singles':1
                                     'search_rest'  '00poprockelectronic':1 '10':3,4 'beats':11 'cd2':2 'electronic':7 'generic':8 'mix':5,6 'or':9 'radio':10
                                    'search_combo'  '00poprockelectronic':15 '03':13C '10':17,18 '2':6A,7A '93':12C '9303':14C 'beats':25 'brothers':10B 'cd2':16 'chemical':9B 'electronic':21 'generic':22 'influence':3A 'mix':4A,5A,19,20 'or':23 'radio':24 'singles':11C 'the':2A,8B 'under':1A
                                    'tag_tracknum'  10
                                      'num_images'  1
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-3', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-3', 'q-chart-4', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['dance', 'electronica', 'techno', 'electronic', 'big beat']
                                        'tag_date'  2003
                                     'discogstags'  ['electronic', 'breakbeat', 'leftfield', 'big beat']

============================== file details ==============================
                                           'mtime'  1620568200.168533  (2021-05-09 15:50:00)
                             'size'  13229815