======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '336'
                                          'artist'  'Yo-Yo Ma'
                                     'text_people'  ''
                                         'release'  'Obrigado Brazil'
                                           'title'  'Menino'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'Q-PLAY-3', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', "
 "'Q-PIANO-2', 'q-chart-3', 'q-drums-1', 'q-other-4', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['instrumental', 'contemporary classical', 'baroque', 'cello', 'classical']"
                                     'discogstags'  ("['latin', 'classical', 'neo-romantic', 'modern', 'neo-classical', "
 "'contemporary', 'post-modern']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '9'
                                      'tracktotal'  '16'
                                            'date'  '2003'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '135.0'
                                             'key'  '11B'
                                        'acoustid'  ''
rest: ''

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

'MCDI' (Music CD identifier)                        MCDI(data=b'1\x000\x00+\x009\x006\x00+\x003\x002\x006\x004\x00+\x007\x00D\x007\x00F\x00+\x00B\x005\x004\x000\x00+\x001\x001\x000\x00C\x00D\x00+\x001\x003\x009\x004\x000\x00+\x001\x009\x000\x008\x007\x00+\x001\x00C\x00E\x006\x00C\x00+\x001\x00F\x00D\x008\x005\x00+\x002\x006\x000\x001\x003\x00+\x002\x00B\x00D\x009\x002\x00+\x003\x001\x002\x001\x00D\x00+\x003\x006\x00B\x008\x007\x00+\x003\x00A\x00F\x008\x004\x00+\x004\x005\x00C\x000\x00E\x00+\x004\x009\x009\x00C\x006\x00+\x004\x00E\x00F\x00C\x00C\x00\x00\x00')
'TALB' (Album/Movie/Show title)                     'Obrigado Brazil'
'TBPM' (BPM (beats per minute))                     '135.0'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDRC' (Recording time)                             '2003'
'TIT2' (Title/songname/content description)         'Menino'
'TKEY' (Initial key)                                '11B'
'TPE1' (Lead performer(s)/Soloist(s))               'Yo-Yo Ma'
'TRCK' (Track number/Position in set)               '9/16'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['latin',
 'classical',
 'neo-romantic',
 'modern',
 'neo-classical',
 'contemporary',
 'post-modern']
'TXXX:lastfmtags'                                   ['instrumental', 'contemporary classical', 'baroque', 'cello', 'classical']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+2.32 dB'
'TXXX:replaygain_track_peak'                        '0.883874'

========================== row from database ==========================
                                              'id'  312721
                                            'path'  /data/Music/Bulk/00instruments-classical/Yo-Yo Ma/Obrigado Brazil/09 Menino.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  336
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  13461504
                                           'mtime'  1620561907
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical 09 prerock classical or classical instruments
                                      'tag_artist'  Yo-Yo Ma
                                     'tag_release'  Obrigado Brazil
                                       'tag_title'  Menino
                                             'bpm'  135.0
                                    'search_title'  'menino':1
                                   'search_artist'  'ma':4 'yo':1,2 'yoyo':3
                                  'search_release'  'brazil':2 'obrigado':1
                                     'search_rest'  '00instruments':1 'classical':2 'instruments':5 'or':4 'prerock':3
                                    'search_combo'  '00instruments':8 'brazil':7C 'classical':9 'instruments':12 'ma':5B 'menino':1A 'obrigado':6C 'or':11 'prerock':10 'yo':2B,3B 'yoyo':4B
                                    'tag_tracknum'  9
                                      'num_images'  0
                                             'key'  11B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-4', 'Q-HAP-3', 'Q-PLAY-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['instrumental', 'contemporary classical', 'baroque', 'cello', 'classical']
                                        'tag_date'  2003
                                     'discogstags'  ['latin', 'classical', 'neo-romantic', 'modern', 'neo-classical', 'contemporary', 'post-modern']

============================== file details ==============================
                                           'mtime'  1620561907.2308583  (2021-05-09 14:05:07)
                             'size'  13461504