======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '204'
                                          'artist'  'Glenn Gould'
                                     'text_people'  ''
                                         'release'  'The Glenn Gould Silver Jubilee Album'
                                           'title'  ('Richard Strauss: Ophelia-Lieder, Op. 67: Three songs after William '
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 "'Q-PIANO-3', 'q-chart-3', 'q-drums-1', 'q-other-1', 'q-vocals-4', "
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                                      'lastfmtags'  "['piano', 'bach', 'baroque', 'classical', 'canadian']"
                                     'discogstags'  "['baroque', 'classical', 'interview', 'classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '10'
                                      'tracktotal'  ''
                                            'date'  '2006'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '143.7'
                                             'key'  '11B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Glenn Gould Silver Jubilee Album'
'TBPM' (BPM (beats per minute))                     '143.7'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDRC' (Recording time)                             '2006'
'TIT2' (Title/songname/content description)         ('Richard Strauss: Ophelia-Lieder, Op. 67: Three songs after William '
 'Shakespear...')
'TKEY' (Initial key)                                '11B'
'TPE1' (Lead performer(s)/Soloist(s))               'Glenn Gould'
'TRCK' (Track number/Position in set)               '10'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['baroque', 'classical', 'interview', 'classical']
'TXXX:lastfmtags'                                   ['piano', 'bach', 'baroque', 'classical', 'canadian']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.97 dB'
'TXXX:replaygain_track_peak'                        '0.716892'

========================== row from database ==========================
                                              'id'  1380122
                                            'path'  /data/Music/Bulk/00instruments-classical/CD63A - The Glenn Gould Silver Jubilee Album/10.Richard Strauss_ Ophelia-Lieder, Op. 67_ Three songs after William Shakespear....mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  204
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  8197504
                                           'mtime'  1620574140
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical CD63A 10.Richard Strauss_ 67_ prerock classical or classical instruments
                                      'tag_artist'  Glenn Gould
                                     'tag_release'  The Glenn Gould Silver Jubilee Album
                                       'tag_title'  Richard Strauss: Ophelia-Lieder, Op. 67: Three songs after William Shakespear...
                                             'bpm'  143.7
                                    'search_title'  '67':9,10 'after':13 'lieder':5 'op':7,8 'ophelia':4 'ophelialieder':6 'richard':1 'shakespear':15,16 'songs':12 'strauss':2,3 'three':11 'william':14
                                   'search_artist'  'glenn':1 'gould':2
                                  'search_release'  'album':6 'glenn':2 'gould':3 'jubilee':5 'silver':4 'the':1
                                     'search_rest'  '00instruments':1 '10':4 '10richard':6 '67':8 'cd63a':3 'classical':2 'instruments':11 'or':10 'prerock':9 'richard':5 'strauss':7
                                    'search_combo'  '00instruments':25 '10':28 '10richard':30 '67':9A,10A,32 'after':13A 'album':24C 'cd63a':27 'classical':26 'glenn':17B,20C 'gould':18B,21C 'instruments':35 'jubilee':23C 'lieder':5A 'op':7A,8A 'ophelia':4A 'ophelialieder':6A 'or':34 'prerock':33 'richard':1A,29 'shakespear':15A,16A 'silver':22C 'songs':12A 'strauss':2A,3A,31 'the':19C 'three':11A 'william':14A
                                    'tag_tracknum'  10
                                      'num_images'  0
                                             'key'  11B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-3', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['piano', 'bach', 'baroque', 'classical', 'canadian']
                                        'tag_date'  2006
                                     'discogstags'  ['baroque', 'classical', 'interview', 'classical']

============================== file details ==============================
                                           'mtime'  1620574139.8301544  (2021-05-09 17:28:59)
                             'size'  8197504