======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '101'
                                          'artist'  'Wolfgang Amadeus Mozart'
                                     'text_people'  ''
                                         'release'  'Complete Mozart Edition Volume 41 CD 3'
                                           'title'  "Finale - Questo e' il fin di chi fa mal"
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
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 "'q-chart-3', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
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                                      'lastfmtags'  "['instrumental', 'composers', 'piano', 'classical', 'classic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '17'
                                      'tracktotal'  ''
                                            'date'  '1990'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '145.5'
                                             'key'  '11A'
                                        'acoustid'  ''
rest: ''

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

'COMM:iTunNORM:eng'                                 (' 000002A6 000001CD 00001583 00000A88 0000755E 00007575 00004297 00003583 '
 '0000755E 00004E65')
'TALB' (Album/Movie/Show title)                     'Complete Mozart Edition Volume 41 CD 3'
'TBPM' (BPM (beats per minute))                     '145.5'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDRC' (Recording time)                             '1990'
'TIT2' (Title/songname/content description)         "Finale - Questo e' il fin di chi fa mal"
'TKEY' (Initial key)                                '11A'
'TPE1' (Lead performer(s)/Soloist(s))               'Wolfgang Amadeus Mozart'
'TRCK' (Track number/Position in set)               '17'
'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'                        '+0.87 dB'
'TXXX:replaygain_track_peak'                        '0.586010'

========================== row from database ==========================
                                              'id'  1506482
                                            'path'  /data/Music/Bulk/00instruments-classical/W A Mozart/Complete Mozart Edition Volume 41 CD 3/17 Finale - Questo e_ il fin di chi fa mal.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  101
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  2443136
                                           'mtime'  1620561883
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical 17 e_ prerock classical or classical instruments
                                      'tag_artist'  Wolfgang Amadeus Mozart
                                     'tag_release'  Complete Mozart Edition Volume 41 CD 3
                                       'tag_title'  Finale - Questo e' il fin di chi fa mal
                                             'bpm'  145.5
                                    'search_title'  'chi':8 'di':7 'e':3,4 'fa':9 'fin':6 'finale':1 'il':5 'mal':10 'questo':2
                                   'search_artist'  'amadeus':2 'mozart':3 'wolfgang':1
                                  'search_release'  '3':7 '41':5 'cd':6 'complete':1 'edition':3 'mozart':2 'volume':4
                                     'search_rest'  '00instruments':1 'classical':2 'e':3 'instruments':6 'or':5 'prerock':4
                                    'search_combo'  '00instruments':21 '3':20C '41':18C 'amadeus':12B 'cd':19C 'chi':8A 'classical':22 'complete':14C 'di':7A 'e':3A,4A,23 'edition':16C 'fa':9A 'fin':6A 'finale':1A 'il':5A 'instruments':26 'mal':10A 'mozart':13B,15C 'or':25 'prerock':24 'questo':2A 'volume':17C 'wolfgang':11B
                                    'tag_tracknum'  17
                                      'num_images'  0
                                             'key'  11A
                                           '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'  1620561883.0308695  (2021-05-09 14:04:43)
                             'size'  2443136