======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '361'
                                          'artist'  'Ludwig Van Beethoven'
                                     'text_people'  ''
                                         'release'  'Klaviersonaten'
                                           'title'  "'Mondschein-Sonate' Adagio sostenuto - Attacca-"
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'Q-PLAY-3', 'q-bass-1', 'q-busy-2', 'q-grit-2', "
 "'Q-PIANO-4', 'q-chart-3', 'q-drums-1', 'q-other-3', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['instrumental', 'composers', 'romantic', 'classical', 'classic']"
                                     'discogstags'  "['classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  ''
                                            'date'  '1991'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '142.6'
                                             'key'  '12A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Klaviersonaten'
'TBPM' (BPM (beats per minute))                     '142.6'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDRC' (Recording time)                             '1991'
'TIT2' (Title/songname/content description)         "'Mondschein-Sonate' Adagio sostenuto - Attacca-"
'TKEY' (Initial key)                                '12A'
'TLEN' (Length)                                     '361848'
'TMED' (Media type)                                 'DIG'
'TPE1' (Lead performer(s)/Soloist(s))               'Ludwig Van Beethoven'
'TRCK' (Track number/Position in set)               '4'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '4'
'TXXX:Q-PLAY'                                       '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'classical'
'TXXX:lastfmtags'                                   ['instrumental', 'composers', 'romantic', 'classical', 'classic']
'TXXX:original release date'                        ['1990', '1991']
'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'                                      '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+5.24 dB'
'TXXX:replaygain_track_peak'                        '0.911151'

========================== row from database ==========================
                                              'id'  1517610
                                            'path'  /data/Music/Bulk/00instruments-classical/Beethoven/Beethoven - Mondschein-sonate_ Adagio Sostenuto - Attacca-.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  361
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  5791616
                                           'mtime'  1620574129
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical sonate_ Sostenuto prerock classical or classical instruments
                                      'tag_artist'  Ludwig Van Beethoven
                                     'tag_release'  Klaviersonaten
                                       'tag_title'  'Mondschein-Sonate' Adagio sostenuto - Attacca-
                                             'bpm'  142.6
                                    'search_title'  'adagio':4 'attacca':6,7 'mondschein':1 'mondscheinsonate':3 'sonate':2 'sostenuto':5
                                   'search_artist'  'beethoven':3 'ludwig':1 'van':2
                                  'search_release'  'klaviersonaten':1
                                     'search_rest'  '00instruments':1 'classical':2 'instruments':7 'or':6 'prerock':5 'sonate':3 'sostenuto':4
                                    'search_combo'  '00instruments':12 'adagio':4A 'attacca':6A,7A 'beethoven':10B 'classical':13 'instruments':18 'klaviersonaten':11C 'ludwig':8B 'mondschein':1A 'mondscheinsonate':3A 'or':17 'prerock':16 'sonate':2A,14 'sostenuto':5A,15 'van':9B
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  12A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-4', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-3', 'Q-HAP-3', 'Q-PLAY-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['instrumental', 'composers', 'romantic', 'classical', 'classic']
                                        'tag_date'  1991
                                     'discogstags'  ['classical']

============================== file details ==============================
                                           'mtime'  1620574128.8739064  (2021-05-09 17:28:48)
                             'size'  5791616