======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '309'
                                          'artist'  'alexander zhikharev'
                                     'text_people'  ''
                                         'release'  'singing bronze'
                                           'title'  'singing bronze 1'
                                           'quals'  ("['Q-JZFKS-1', 'Q-UNU-1', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', "
 "'q-play-2', 'Q-OLDST-3', 'q-chart-1', 'q-drums-1', 'q-other-4', 'q-piano-1', "
 "'q-vocals-1', 'Q-HHRNBTT-1', 'q-mixbeat-1', 'Q-LOCALNESS-1']")
                                      'lastfmtags'  "['ambient', 'russia', 'worship', 'meditation', 'bells']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  ''
                                            'date'  '2003'
                                        'comments'  ''
                                           'genre'  'electronic-unsorted'
                                             'bpm'  '129.1'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:Songs-DB_Custom1:XXX'                         'check'
'COMM:Songs-DB_Custom2:XXX'                         'lars'
'TALB' (Album/Movie/Show title)                     'singing bronze'
'TBPM' (BPM (beats per minute))                     '129.1'
'TCON' (Content type, a.k.a. Genre)                 'electronic-unsorted'
'TIT2' (Title/songname/content description)         'singing bronze 1'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'alexander zhikharev'
'TRCK' (Track number/Position in set)               '1'
'TXXX:DATE'                                         '2003'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['ambient', 'russia', 'worship', 'meditation', 'bells']
'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'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.29 dB'
'TXXX:replaygain_track_peak'                        '0.495982'

========================== row from database ==========================
                                              'id'  722860
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/alexander zhikharev - 2003 - singing bronze/01 - singing bronze 1.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  309
                                           'genre'  electronic-unsorted
                                        'filesize'  12784578
                                           'mtime'  1620517036
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm 2003 01 electronic unsorted
                                      'tag_artist'  alexander zhikharev
                                     'tag_release'  singing bronze
                                       'tag_title'  singing bronze 1
                                             'bpm'  129.1
                                    'search_title'  '1':3 'bronze':2 'singing':1
                                   'search_artist'  'alexander':1 'zhikharev':2
                                  'search_release'  'bronze':2 'singing':1
                                     'search_rest'  '2003':1 'electronic':2 'unsorted':3
                                    'search_combo'  '1':3A '2003':8 'alexander':4B 'bronze':2A,7C 'electronic':9 'singing':1A,6C 'unsorted':10 'zhikharev':5B
                                    'tag_tracknum'  1
                                      'num_images'  1
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-1', 'q-other-4', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['ambient', 'russia', 'worship', 'meditation', 'bells']
                                        'tag_date'  2003
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620517035.953216  (2021-05-09 01:37:15)
                             'size'  12784578