======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '227'
                                          'artist'  'Electric Light Orchestra'
                                     'text_people'  ''
                                         'release'  'Out Of The Blue'
                                           'title'  'Turn To Stone'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-4', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['rock', 'progressive rock', 'british', '70s', 'classic rock']"
                                     'discogstags'  "['rock', 'prog rock', 'symphonic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  '17'
                                            'date'  '1977'
                                        'comments'  ''
                                           'genre'  'rock-cppex-classic;set-pl-billboard'
                                             'bpm'  '141.019'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:XXX'                            ' 000007B1 000006D8 00002EF3'
'COMM:iTunNORM:eng'                                 (' 000007B1 000006D8 00002EF3 00003238 00014FB1 00014FB1 000074E0 00007C5F '
 '0001AEA8 00033B64')
'TALB' (Album/Movie/Show title)                     'Out Of The Blue'
'TBPM' (BPM (beats per minute))                     '141.019'
'TCON' (Content type, a.k.a. Genre)                 ['rock-cppex-classic', 'set-pl-billboard']
'TDRC' (Recording time)                             '1977'
'TIT2' (Title/songname/content description)         'Turn To Stone'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Electric Light Orchestra'
'TPE2' (Band/orchestra/accompaniment)               'Electric Light Orchestra'
'TPOS' (Part of a set)                              '3/3'
'TRCK' (Track number/Position in set)               '1/17'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['rock', 'prog rock', 'symphonic rock']
'TXXX:lastfmtags'                                   ['rock', 'progressive rock', 'british', '70s', 'classic rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'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'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.28 dB'
'TXXX:replaygain_track_peak'                        '0.577757'

========================== row from database ==========================
                                              'id'  1416430
                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/Electric Light Orchestra - Out of the Blue/elo - electric light orchestra - turn to stone.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  227
                                           'genre'  rock-cppex-classic;set-pl-billboard
                                        'filesize'  3710615
                                           'mtime'  1636038711
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy of the elo electric light orchestra turn stone rock cppex classic;set pl billboard
                                      'tag_artist'  Electric Light Orchestra
                                     'tag_release'  Out Of The Blue
                                       'tag_title'  Turn To Stone
                                             'bpm'  141.019
                                    'search_title'  'stone':3 'to':2 'turn':1
                                   'search_artist'  'electric':1 'light':2 'orchestra':3
                                  'search_release'  'blue':4 'of':2 'out':1 'the':3
                                     'search_rest'  'billboard':17 'classic':12,14 'classicprogpsy':1 'cppex':11 'electric':5 'elo':4 'light':6 'of':2 'orchestra':7 'pl':16 'rock':10 'set':13,15 'stone':9 'the':3 'turn':8
                                    'search_combo'  'billboard':27 'blue':10C 'classic':22,24 'classicprogpsy':11 'cppex':21 'electric':4B,15 'elo':14 'light':5B,16 'of':8C,12 'orchestra':6B,17 'out':7C 'pl':26 'rock':20 'set':23,25 'stone':3A,19 'the':9C,13 'to':2A 'turn':1A,18
                                    'tag_tracknum'  1
                                      'num_images'  1
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['rock', 'progressive rock', 'british', '70s', 'classic rock']
                                        'tag_date'  1977
                                     'discogstags'  ['rock', 'prog rock', 'symphonic rock']

============================== file details ==============================
                                           'mtime'  1636038711.4956417  (2021-11-04 16:11:51)
                             'size'  3710615