======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '255'
                                          'artist'  'Edvin Marton'
                                     'text_people'  ''
                                         'release'  'Virtuoso'
                                           'title'  'Love Story'
                                           '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-3', 'q-busy-3', 'q-grit-2', "
 "'Q-PIANO-4', 'q-chart-2', 'q-drums-2', 'q-other-3', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  ("['new age', 'classical', 'hungarian', 'modern classical', 'instrumental', "
 "'violin']")
                                     'discogstags'  "['classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  ''
                                            'date'  '2004'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '95.890'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            'ADR'
'TALB' (Album/Movie/Show title)                     'Virtuoso'
'TBPM' (BPM (beats per minute))                     '95.890'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDRC' (Recording time)                             '2004'
'TIT2' (Title/songname/content description)         'Love Story'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Edvin Marton'
'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-PIANO'                                      '4'
'TXXX:Q-PLAY'                                       '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'classical'
'TXXX:lastfmtags'                                   ['new age',
 'classical',
 'hungarian',
 'modern classical',
 'instrumental',
 'violin']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.52 dB'
'TXXX:replaygain_track_peak'                        '0.429464'

========================== row from database ==========================
                                              'id'  171832
                                            'path'  /data/Music/Bulk/00instruments-classical/Edvin Marton/03_love_story.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  255
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  6146215
                                           'mtime'  1620574165
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical 03_love_story prerock classical classical instruments
                                      'tag_artist'  Edvin Marton
                                     'tag_release'  Virtuoso
                                       'tag_title'  Love Story
                                             'bpm'  95.89
                                    'search_title'  'love':1 'story':2
                                   'search_artist'  'edvin':1 'marton':2
                                  'search_release'  'virtuoso':1
                                     'search_rest'  '00instruments':1 '03':3 'classical':2 'instruments':7 'love':4 'prerock':6 'story':5
                                    'search_combo'  '00instruments':6 '03':8 'classical':7 'edvin':3B 'instruments':12 'love':1A,9 'marton':4B 'prerock':11 'story':2A,10 'virtuoso':5C
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  8A
                                           '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-3', 'q-drums-2', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'Q-PLAY-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['new age', 'classical', 'hungarian', 'modern classical', 'instrumental', 'violin']
                                        'tag_date'  2004
                                     'discogstags'  ['classical']

============================== file details ==============================
                                           'mtime'  1620574164.7781386  (2021-05-09 17:29:24)
                             'size'  6146215