======================== unified (from filesystem) ========================
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                                        'duration'  '410'
                                          'artist'  'Johann Sebastian Bach'
                                     'text_people'  ''
                                         'release'  'Best Of'
                                           'title'  'Double Concerto in D minor, BWV 1043 Largo ma non Tanto'
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                                      'lastfmtags'  "['instrumental', 'composers', 'baroque', 'german', 'classical']"
                                     'discogstags'  "['baroque', 'classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '16'
                                      'tracktotal'  ''
                                            'date'  '1997'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '120.327'
                                             'key'  '8B'
                                        'acoustid'  ''
rest: ''

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

'album'                                             'Best Of'
'albumartist'                                       'Bach'
'artist'                                            'Johann Sebastian Bach'
'bpm'                                               '120.327'
'date'                                              '1997'
'discogstags'                                       ['baroque', 'classical']
'encoder'                                           'MediaMonkey 3.0.2'
'ensemble'                                          'Bach'
'genre'                                             'prerock-classical or classical instruments'
'key'                                               '8B'
'lastfmtags'                                        ['instrumental', 'composers', 'baroque', 'german', 'classical']
'q-bass'                                            '1'
'q-busy'                                            '3'
'q-chart'                                           '2'
'q-drums'                                           '1'
'q-grit'                                            '2'
'q-hap'                                             '2'
'q-hhrnbtt'                                         '1'
'q-jzfks'                                           '1'
'q-localness'                                       '2'
'q-mixbeat'                                         '1'
'q-oldst'                                           '1'
'q-other'                                           '4'
'q-piano'                                           '1'
'q-play'                                            '2'
'q-syn'                                             '2'
'q-unu'                                             '1'
'q-vocals'                                          '1'
'replaygain_track_gain'                             '+7.20 dB'
'replaygain_track_peak'                             '0.439173'
'title'                                             'Double Concerto in D minor, BWV 1043 Largo ma non Tanto'
'tracknumber'                                       '16'

========================== row from database ==========================
                                              'id'  1314638
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/16. Bach - Double Concerto in D minor, BWV 1043 Largo ma non Tanto.ogg
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  410
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  8991878
                                           'mtime'  1637329819
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] 16. prerock classical classical instruments
                                      'tag_artist'  Johann Sebastian Bach
                                     'tag_release'  Best Of
                                       'tag_title'  Double Concerto in D minor, BWV 1043 Largo ma non Tanto
                                             'bpm'  120.327
                                    'search_title'  '1043':8 'bwv':7 'concerto':2 'd':4 'double':1 'in':3 'largo':9 'ma':10 'minor':5,6 'non':11 'tanto':12
                                   'search_artist'  'bach':3 'johann':1 'sebastian':2
                                  'search_release'  'best':1 'of':2
                                     'search_rest'  '00poprockelectronic':1 '16':7,8 'classical':10 'files':5,6 'instruments':11 'loose':3,4 'prerock':9 'unsorted':2
                                    'search_combo'  '00poprockelectronic':18 '1043':8A '16':24,25 'bach':15B 'best':16C 'bwv':7A 'classical':27 'concerto':2A 'd':4A 'double':1A 'files':22,23 'in':3A 'instruments':28 'johann':13B 'largo':9A 'loose':20,21 'ma':10A 'minor':5A,6A 'non':11A 'of':17C 'prerock':26 'sebastian':14B 'tanto':12A 'unsorted':19
                                    'tag_tracknum'  16
                                      'num_images'  0
                                             'key'  8B
                                           'quals'  ['q-mixbeat-1', 'q-chart-2', 'q-other-4', 'q-oldst-1', 'q-grit-2', 'q-hap-2', 'q-drums-1', 'q-busy-3', 'q-localness-2', 'q-jzfks-1', 'q-hhrnbtt-1', 'q-syn-2', 'q-piano-1', 'q-play-2', 'q-bass-1', 'q-vocals-1', 'q-unu-1']
                                      'lastfmtags'  ['instrumental', 'composers', 'baroque', 'german', 'classical']
                                        'tag_date'  1997
                                     'discogstags'  ['baroque', 'classical']

============================== file details ==============================
                                           'mtime'  1637329819.4135668  (2021-11-19 14:50:19)
                             'size'  8991878