======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '314'
                                          'artist'  'The Stone Roses'
                                     'text_people'  ''
                                         'release'  'In The Studio 2'
                                           'title'  'How Do You Sleep'
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                                      'lastfmtags'  "['indie', 'madchester', 'britpop', 'alternative', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '17'
                                      'tracktotal'  '18'
                                            'date'  '1990'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter-indie-rock'
                                             'bpm'  '86.180'
                                             'key'  '5B'
                                        'acoustid'  ''
rest: ''

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

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'COMM:iTunNORM:eng'                                 (' 00000026 00000034 000000D1 0000016A 0001F6A7 0001F672 000017FE 00001A74 '
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'COMM:iTunes_CDDB_IDs:eng'                          '18+A9A7D83EC269E0930667CDDF0BE902D3+3119541'
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'TBPM' (BPM (beats per minute))                     '86.180'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter-indie-rock'
'TDRC' (Recording time)                             '1990'
'TENC' (Encoded by)                                 'iTunes v6.0.5'
'TIT2' (Title/songname/content description)         'How Do You Sleep'
'TKEY' (Initial key)                                '5B'
'TPE1' (Lead performer(s)/Soloist(s))               'The Stone Roses'
'TRCK' (Track number/Position in set)               '17/18'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['indie', 'madchester', 'britpop', 'alternative', 'rock']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.10 dB'
'TXXX:replaygain_track_peak'                        '0.584973'

========================== row from database ==========================
                                              'id'  1268951
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/The Stone Roses/Stone Roses - In The Studio 2/17 How Do You Sleep.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  314
                                           'genre'  ifs-songwriter-indie-rock
                                        'filesize'  7544262
                                           'mtime'  1638554827
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos 17 ifs songwriter indie rock
                                      'tag_artist'  The Stone Roses
                                     'tag_release'  In The Studio 2
                                       'tag_title'  How Do You Sleep
                                             'bpm'  86.18
                                    'search_title'  'do':2 'how':1 'sleep':4 'you':3
                                   'search_artist'  'roses':3 'stone':2 'the':1
                                  'search_release'  '2':4 'in':1 'studio':3 'the':2
                                     'search_rest'  '00singer':1 'eos':3 'ifs':4 'indie':5 'rock':6 'songwriter':2
                                    'search_combo'  '00singer':12 '2':11C 'do':2A 'eos':14 'how':1A 'ifs':15 'in':8C 'indie':16 'rock':17 'roses':7B 'sleep':4A 'songwriter':13 'stone':6B 'studio':10C 'the':5B,9C 'you':3A
                                    'tag_tracknum'  17
                                      'num_images'  0
                                             'key'  5B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-4', 'q-other-4', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['indie', 'madchester', 'britpop', 'alternative', 'rock']
                                        'tag_date'  1990
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1638554827.008648  (2021-12-03 19:07:07)
                             'size'  7544262