======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '140'
                                          'artist'  'Sestry Fedorovy'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Voronezhskij khorovod i chastushki'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-OLDST-2', 'Q-UNU-2', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-3', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-1', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'loc-russia'
                                             'bpm'  '135.004'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'PRIV:AverageLevel:{\t\x00\x00'                     PRIV(owner='AverageLevel', data=b'{\t\x00\x00')
'PRIV:PeakValue:¡[\x00\x00'                         PRIV(owner='PeakValue', data=b'\xa1[\x00\x00')
'TBPM' (BPM (beats per minute))                     '135.004'
'TCON' (Content type, a.k.a. Genre)                 'loc-russia'
'TIT2' (Title/songname/content description)         'Voronezhskij khorovod i chastushki'
'TKEY' (Initial key)                                '8A'
'TLEN' (Length)                                     '000000140852'
'TPE1' (Lead performer(s)/Soloist(s))               'Sestry Fedorovy'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '2'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.99 dB'
'TXXX:replaygain_track_peak'                        '0.506461'

========================== row from database ==========================
                                              'id'  763502
                                            'path'  /data/Music/Bulk/00localcharacter/Sestry_Fedorovy/Sestry Fedorovy - Voronezhskij khorovod i chastushki.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  140
                                           'genre'  loc-russia
                                        'filesize'  2258567
                                           'mtime'  1621629775
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter Sestry_Fedorovy loc russia
                                      'tag_artist'  Sestry Fedorovy
                                     'tag_release'  None
                                       'tag_title'  Voronezhskij khorovod i chastushki
                                             'bpm'  135.004
                                    'search_title'  'chastushki':4 'i':3 'khorovod':2 'voronezhskij':1
                                   'search_artist'  'fedorovy':2 'sestry':1
                                  'search_release'  
                                     'search_rest'  'fedorovy':2 'loc':3 'russia':4 'sestry':1
                                    'search_combo'  'chastushki':4A 'fedorovy':6B,8 'i':3A 'khorovod':2A 'loc':9 'russia':10 'sestry':5B,7 'voronezhskij':1A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621629774.904572  (2021-05-21 22:42:54)
                             'size'  2258567