======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '129'
                                          'artist'  '[unknown]'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Troika'
                                           'quals'  ("['Q-HAP-3', 'Q-OLDST-2', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-3', 'q-syn-1', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'loc-russia'
                                             'bpm'  '106.196'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '106.196'
'TCON' (Content type, a.k.a. Genre)                 'loc-russia'
'TIT2' (Title/songname/content description)         'Troika'
'TKEY' (Initial key)                                '7A'
'TPE1' (Lead performer(s)/Soloist(s))               '[unknown]'
'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'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'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'                        '-0.31 dB'
'TXXX:replaygain_track_peak'                        '0.600731'

========================== row from database ==========================
                                              'id'  1534549
                                            'path'  /data/Music/Bulk/00poprockelectronic/Troika.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  129
                                           'genre'  loc-russia
                                        'filesize'  2075818
                                           'mtime'  1621629408
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic loc russia
                                      'tag_artist'  [unknown]
                                     'tag_release'  None
                                       'tag_title'  Troika
                                             'bpm'  106.196
                                    'search_title'  'troika':1
                                   'search_artist'  'unknown':1,2
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'loc':2 'russia':3
                                    'search_combo'  '00poprockelectronic':4 'loc':5 'russia':6 'troika':1A 'unknown':2B,3B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', '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-2', 'q-other-4', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621629408.3775017  (2021-05-21 22:36:48)
                             'size'  2075818