======================== unified (from filesystem) ========================
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                                        'duration'  '153'
                                          'artist'  'Billy Bragg'
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                                         'release'  'Back to Basics'
                                           'title'  'The World Turned Upside Down'
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                                      'lastfmtags'  "['rock', 'political', 'british', 'folk', 'singer songwriter']"
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                            'musicbrainz_artistid'  ''
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                                     'tracknumber'  '20'
                                      'tracktotal'  '21'
                                            'date'  '1987'
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'TDOR' (Original release time)                      '1987'
'TDRC' (Recording time)                             '1987'
'TIT2' (Title/songname/content description)         'The World Turned Upside Down'
'TKEY' (Initial key)                                '12B'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Billy Bragg'
'TPE2' (Band/orchestra/accompaniment)               'Billy Bragg'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Elektra/Asylum Records'
'TRCK' (Track number/Position in set)               '20/21'
'TSO2'                                              'Bragg, Billy'
'TSOP' (Performer sort order)                       'Bragg, Billy'
'TSRC' (ISRC (international standard recording code))  'GBCEJ0300131/GBCEJ0500335'
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'TXXX:MusicBrainz Album Id'                         'dbf831ee-81e5-4897-867e-0f4bbe21a933'
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'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'compilation'
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'TXXX:q-drums'                                      '1'
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'TXXX:replaygain_track_peak'                        '0.476455'
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========================== row from database ==========================
                                              'id'  1374128
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/Billy Bragg - Back To Basics/20 - The World Turned Upside Down.mp3
                                         'working'  None
                                         'bitrate'  194
                                    'duration_sec'  153
                                           'genre'  ifs-songwriter-rock
                                        'filesize'  3743741
                                           'mtime'  1638562493
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                                        'rest_str'   00singer songwriter eos To 20 ifs songwriter rock
                                      'tag_artist'  Billy Bragg
                                     'tag_release'  Back to Basics
                                       'tag_title'  The World Turned Upside Down
                                             'bpm'  108.2
                                    'search_title'  'down':5 'the':1 'turned':3 'upside':4 'world':2
                                   'search_artist'  'billy':1 'bragg':2
                                  'search_release'  'back':1 'basics':3 'to':2
                                     'search_rest'  '00singer':1 '20':5 'eos':3 'ifs':6 'rock':7 'songwriter':2 'to':4
                                    'search_combo'  '00singer':11 '20':15 'back':8C 'basics':10C 'billy':6B 'bragg':7B 'down':5A 'eos':13 'ifs':16 'rock':17 'songwriter':12 'the':1A 'to':9C,14 'turned':3A 'upside':4A 'world':2A
                                    'tag_tracknum'  20
                                      'num_images'  0
                                             'key'  12B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', '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-1', 'q-syn-2', 'q-chart-3', 'q-other-3', 'Q-HAP-2', 'q-bass-1', 'q-grit-3']
                                      'lastfmtags'  ['rock', 'political', 'british', 'folk', 'singer songwriter']
                                        'tag_date'  1987
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1638562492.5553837  (2021-12-03 21:14:52)
                             'size'  3743741