======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '92'
                                          'artist'  'Wolfgang Amadeus Mozart'
                                     'text_people'  ''
                                         'release'  'Complete Mozart Edition Volume 41 CD 2'
                                           'title'  'Recitativo - Io deggio ad ogni patto'
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                                      'lastfmtags'  "['instrumental', 'composers', 'piano', 'classical', 'classic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  ''
                                            'date'  '1990'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '89.8'
                                             'key'  '5A'
                                        'acoustid'  ''
rest: ''

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

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 '000090A6 000090BD')
'TALB' (Album/Movie/Show title)                     'Complete Mozart Edition Volume 41 CD 2'
'TBPM' (BPM (beats per minute))                     '89.8'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDRC' (Recording time)                             '1990'
'TIT2' (Title/songname/content description)         'Recitativo - Io deggio ad ogni patto'
'TKEY' (Initial key)                                '5A'
'TPE1' (Lead performer(s)/Soloist(s))               'Wolfgang Amadeus Mozart'
'TRCK' (Track number/Position in set)               '3'
'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'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+3.73 dB'
'TXXX:replaygain_track_peak'                        '0.748021'

========================== row from database ==========================
                                              'id'  275509
                                            'path'  /data/Music/Bulk/00instruments-classical/W A Mozart/Complete Mozart Edition Volume 41 CD 2/03 Recitativo - Io deggio ad ogni patto.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  92
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  2221952
                                           'mtime'  1620561877
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical 03 prerock classical or classical instruments
                                      'tag_artist'  Wolfgang Amadeus Mozart
                                     'tag_release'  Complete Mozart Edition Volume 41 CD 2
                                       'tag_title'  Recitativo - Io deggio ad ogni patto
                                             'bpm'  89.8
                                    'search_title'  'ad':4 'deggio':3 'io':2 'ogni':5 'patto':6 'recitativo':1
                                   'search_artist'  'amadeus':2 'mozart':3 'wolfgang':1
                                  'search_release'  '2':7 '41':5 'cd':6 'complete':1 'edition':3 'mozart':2 'volume':4
                                     'search_rest'  '00instruments':1 'classical':2 'instruments':5 'or':4 'prerock':3
                                    'search_combo'  '00instruments':17 '2':16C '41':14C 'ad':4A 'amadeus':8B 'cd':15C 'classical':18 'complete':10C 'deggio':3A 'edition':12C 'instruments':21 'io':2A 'mozart':9B,11C 'ogni':5A 'or':20 'patto':6A 'prerock':19 'recitativo':1A 'volume':13C 'wolfgang':7B
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  5A
                                           '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-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['instrumental', 'composers', 'piano', 'classical', 'classic']
                                        'tag_date'  1990
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561877.3391068  (2021-05-09 14:04:37)
                             'size'  2221952