======================== unified (from filesystem) ========================
                                         'bitrate'  '212.291'
                                        'duration'  '208'
                                          'artist'  'Electric Light Orchestra'
                                     'text_people'  ''
                                         'release'  'Nanarland Radioblog'
                                           'title'  'Xanadu'
                                           'quals'  ("['Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-UNU-2', 'Q-OLDST-3', "
 "'q-syn-2', 'q-bass-3', 'q-busy-2', 'q-grit-2', 'q-play-3', 'q-chart-2', "
 "'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-2']")
                                      'lastfmtags'  "['rock', 'progressive rock', 'british', '70s', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '10'
                                      'tracktotal'  '10'
                                            'date'  '1980'
                                        'comments'  ''
                                           'genre'  'soundtrack-web'
                                             'bpm'  '127.0'
                                             'key'  '2B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Nanarland Radioblog'
'TBPM' (BPM (beats per minute))                     '127.0'
'TCON' (Content type, a.k.a. Genre)                 'soundtrack-web'
'TDRC' (Recording time)                             '1980'
'TENC' (Encoded by)                                 'Exact Audio Copy   (Tryb pewny)'
'TIT2' (Title/songname/content description)         'Xanadu'
'TKEY' (Initial key)                                '2B'
'TPE1' (Lead performer(s)/Soloist(s))               'Electric Light Orchestra'
'TRCK' (Track number/Position in set)               '10/10'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['rock', 'progressive rock', 'british', '70s', 'classic rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '-0.63 dB'
'TXXX:replaygain_track_peak'                        '0.591331'

========================== row from database ==========================
                                              'id'  1375118
                                            'path'  /data/Music/Bulk/0soundtrack/Nanarland Radioblog/Xanadu_Xanadu_(Electric_Light_Orchestra).mp3
                                         'working'  None
                                         'bitrate'  212
                                    'duration_sec'  208
                                           'genre'  soundtrack-web
                                        'filesize'  5532251
                                           'mtime'  1620329182
                                   'redo_metaread'  0
                                        'rest_str'   0soundtrack Xanadu_Xanadu_(Electric_Light_Orchestra) soundtrack web
                                      'tag_artist'  Electric Light Orchestra
                                     'tag_release'  Nanarland Radioblog
                                       'tag_title'  Xanadu
                                             'bpm'  127.0
                                    'search_title'  'xanadu':1
                                   'search_artist'  'electric':1 'light':2 'orchestra':3
                                  'search_release'  'nanarland':1 'radioblog':2
                                     'search_rest'  '0soundtrack':1 'electric':4,9 'light':5,10 'orchestra':6,11 'soundtrack':12 'web':13 'xanadu':2,3,7,8
                                    'search_combo'  '0soundtrack':7 'electric':2B,10,15 'light':3B,11,16 'nanarland':5C 'orchestra':4B,12,17 'radioblog':6C 'soundtrack':18 'web':19 'xanadu':1A,8,9,13,14
                                    'tag_tracknum'  10
                                      'num_images'  0
                                             'key'  2B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-4', 'q-syn-2', 'q-chart-2', 'q-other-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['rock', 'progressive rock', 'british', '70s', 'classic rock']
                                        'tag_date'  1980
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620329181.5973413  (2021-05-06 21:26:21)
                             'size'  5532251