======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '91'
                                          'artist'  'Wolfgang Amadeus Mozart'
                                     'text_people'  ''
                                         'release'  'Complete Mozart Edition Volume 41 CD 1'
                                           'title'  'Aria - Ho capito signor si'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-3', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['instrumental', 'composers', 'piano', 'classical', 'classic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '10'
                                      'tracktotal'  ''
                                            'date'  '1990'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '131.1'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'COMM:iTunNORM:eng'                                 (' 000001C6 0000016B 00000A9D 00000B4F 00011E2F 0000D6D7 00003E49 000034E3 '
 '00011E2F 0000D6D7')
'TALB' (Album/Movie/Show title)                     'Complete Mozart Edition Volume 41 CD 1'
'TBPM' (BPM (beats per minute))                     '131.1'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDRC' (Recording time)                             '1990'
'TIT2' (Title/songname/content description)         'Aria - Ho capito signor si'
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'Wolfgang Amadeus Mozart'
'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-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['instrumental', 'composers', 'piano', 'classical', 'classic']
'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'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.56 dB'
'TXXX:replaygain_track_peak'                        '0.685652'

========================== row from database ==========================
                                              'id'  320676
                                            'path'  /data/Music/Bulk/00instruments-classical/W A Mozart/Complete Mozart Edition Volume 41 CD 1/10 Aria - Ho capito signor si.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  91
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  2199424
                                           'mtime'  1620561872
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical 10 prerock classical classical instruments
                                      'tag_artist'  Wolfgang Amadeus Mozart
                                     'tag_release'  Complete Mozart Edition Volume 41 CD 1
                                       'tag_title'  Aria - Ho capito signor si
                                             'bpm'  131.1
                                    'search_title'  'aria':1 'capito':3 'ho':2 'si':5 'signor':4
                                   'search_artist'  'amadeus':2 'mozart':3 'wolfgang':1
                                  'search_release'  '1':7 '41':5 'cd':6 'complete':1 'edition':3 'mozart':2 'volume':4
                                     'search_rest'  '00instruments':1 'classical':2 'instruments':4 'prerock':3
                                    'search_combo'  '00instruments':16 '1':15C '41':13C 'amadeus':7B 'aria':1A 'capito':3A 'cd':14C 'classical':17 'complete':9C 'edition':11C 'ho':2A 'instruments':19 'mozart':8B,10C 'prerock':18 'si':5A 'signor':4A 'volume':12C 'wolfgang':6B
                                    'tag_tracknum'  10
                                      'num_images'  0
                                             'key'  9B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['instrumental', 'composers', 'piano', 'classical', 'classic']
                                        'tag_date'  1990
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561871.6004648  (2021-05-09 14:04:31)
                             'size'  2199424