======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '583'
                                          'artist'  'Strauss'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'An der schonen blauen Donau'
                                           'quals'  ("['Q-GRIT-2', 'Q-BUSY-3', 'Q-PLAY-2', 'q-bass-1', 'Q-CHART-2', 'q-drums-1', "
 "'q-other-4', 'q-piano-1', 'q-vocals-1', 'Q-HAP-3', 'Q-SYN-1', 'Q-UNU-1', "
 "'Q-JZFKS-1', 'Q-OLDST-1', 'Q-HHRNBTT-1', 'Q-MIXBEAT-1', 'Q-LOCALNESS-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '0'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '133.0'
                                             'key'  'G m'  (6A)
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '133.0'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TENC' (Encoded by)                                 'iTunes v4.7.1.30'
'TIT2' (Title/songname/content description)         'An der schonen blauen Donau'
'TKEY' (Initial key)                                'G m'
'TPE1' (Lead performer(s)/Soloist(s))               'Strauss'
'TRCK' (Track number/Position in set)               '0'
'TXXX:MusicMagic Data'                              'AgEBOL+3g1O6GQHIg7csPBoXgAGBlYACEhKhG+97gAHb8oABgAEG0LE9gAHTlYkuqOWAAbrUJri5hYABgAGyGB9/9EbFOaCEgAKAAYxStgzsdYWYGfgsyYABgaiAYg2NnysIroIU4IuGGoD9BK6y0Io70V+QAp2lgAHFZwhLwJKeWIABvFsdFu8uwNGqUIACgAE='
'TXXX:MusicMagic Fingerprint'                       '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'
'TXXX:Q-BUSY'                                       '3'
'TXXX:Q-CHART'                                      '2'
'TXXX:Q-GRIT'                                       '2'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-MIXBEAT'                                    '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-SYN'                                        '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:http://www.foosic.org/'                       '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'
'TXXX:q-bass'                                       '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.64 dB'
'TXXX:replaygain_track_peak'                        '0.565661'

========================== row from database ==========================
                                              'id'  1495204
                                            'path'  /data/Music/Other/Pa/Klassiek/Strauss/An der schonen blauen Donau.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  583
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  11682392
                                           'mtime'  1621094168
                                   'redo_metaread'  0
                                        'rest_str'   Pa Klassiek prerock classical or classical instruments
                                      'tag_artist'  Strauss
                                     'tag_release'  None
                                       'tag_title'  An der schonen blauen Donau
                                             'bpm'  133.0
                                    'search_title'  'an':1 'blauen':4 'der':2 'donau':5 'schonen':3
                                   'search_artist'  'strauss':1
                                  'search_release'  
                                     'search_rest'  'classical':4 'instruments':6 'klassiek':2 'or':5 'pa':1 'prerock':3
                                    'search_combo'  'an':1A 'blauen':4A 'classical':10 'der':2A 'donau':5A 'instruments':12 'klassiek':8 'or':11 'pa':7 'prerock':9 'schonen':3A 'strauss':6B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  G m
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'Q-MIXBEAT-1', 'Q-OLDST-1', 'Q-GRIT-2', 'Q-CHART-2', 'Q-JZFKS-1', 'Q-UNU-1', 'q-drums-1', 'Q-SYN-1', 'q-other-4', 'Q-BUSY-3', 'Q-HAP-3', 'Q-PLAY-2', 'q-bass-1']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621094167.671815  (2021-05-15 17:56:07)
                             'size'  11682392