======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '692'
                                          'artist'  'Kronos Quartet'
                                     'text_people'  ''
                                         'release'  "String Quartet No3 Op.67 '...."
                                           'title'  'Deciso-Espressivo ma ben tenut'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-3', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  ("['contemporary classical', 'instrumental', 'string quartet', 'soundtrack', "
 "'classical']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '140.433'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     "String Quartet No3 Op.67 '...."
'TBPM' (BPM (beats per minute))                     '140.433'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TIT2' (Title/songname/content description)         'Deciso-Espressivo ma ben tenut'
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'Kronos Quartet'
'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-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['contemporary classical',
 'instrumental',
 'string quartet',
 'soundtrack',
 'classical']
'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'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+5.37 dB'
'TXXX:replaygain_track_peak'                        '0.982111'

========================== row from database ==========================
                                              'id'  204982
                                            'path'  /data/Music/Bulk/00instruments-classical/Gorecki/Gorecki (Kronos Quartet)/Gorecki - String Quartet 3 Op67 Songs are Sung - 4 - Deciso-Espressivo ma ben tenuto.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  692
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  27707189
                                           'mtime'  1620561566
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical Gorecki Gorecki (Kronos Quartet) Gorecki Op67 Songs are Sung 4 tenuto prerock classical or classical instruments
                                      'tag_artist'  Kronos Quartet
                                     'tag_release'  String Quartet No3 Op.67 '....
                                       'tag_title'  Deciso-Espressivo ma ben tenut
                                             'bpm'  140.433
                                    'search_title'  'ben':5 'deciso':1 'decisoespressivo':3 'espressivo':2 'ma':4 'tenut':6
                                   'search_artist'  'kronos':1 'quartet':2
                                  'search_release'  '67':5 'no3':3 'op':4 'op67':6 'quartet':2 'string':1
                                     'search_rest'  '00instruments':1 '4':12 'are':10 'classical':2 'gorecki':3 'instruments':16 'kronos':4,5 'op67':8 'or':15 'prerock':14 'quartet':6,7 'songs':9 'sung':11 'tenuto':13
                                    'search_combo'  '00instruments':15 '4':26 '67':13C 'are':24 'ben':5A 'classical':16 'deciso':1A 'decisoespressivo':3A 'espressivo':2A 'gorecki':17 'instruments':30 'kronos':7B,18,19 'ma':4A 'no3':11C 'op':12C 'op67':14C,22 'or':29 'prerock':28 'quartet':8B,10C,20,21 'songs':23 'string':9C 'sung':25 'tenut':6A 'tenuto':27
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  9B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['contemporary classical', 'instrumental', 'string quartet', 'soundtrack', 'classical']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561566.0010366  (2021-05-09 13:59:26)
                             'size'  27707189