======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '299'
                                          'artist'  'Demian Licht'
                                     'text_people'  ''
                                         'release'  'Dark Techno'
                                           'title'  'Sin'
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-JZFKS-1', 'Q-OLDST-3', "
 "'Q-LOCALNESS-1', 'q-syn-4', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-3', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-4']")
                                      'lastfmtags'  "['techno']"
                                     'discogstags'  "['techno', 'electronic', 'experimental']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '2015'
                                        'comments'  ''
                                           'genre'  'electronic-th-techno'
                                             'bpm'  '123'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:iTunNORM:eng'                                 (' 000006EC 0000056F 000026CB 00001B33 00035543 00031739 00008577 000084C7 '
 '00035AC6 00031F2F')
'COMM:iTunPGAP:eng'                                 '0'
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 000007E0 0000000000C97110 00000000 00B69F06 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'TALB' (Album/Movie/Show title)                     'Dark Techno'
'TBPM' (BPM (beats per minute))                     '123'
'TCON' (Content type, a.k.a. Genre)                 'electronic-th-techno'
'TDRC' (Recording time)                             '2015'
'TENC' (Encoded by)                                 'iTunes 12.2.2.25'
'TIT2' (Title/songname/content description)         'Sin'
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'Demian Licht'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TXXX:Collection'                                   'Rock & Pop'
'TXXX:Dynamic Range (DR)'                           '9'
'TXXX:Dynamic Range (R128)'                         '4.3271899223327637'
'TXXX:Peak Level (R128)'                            '+0.3 dBTP; +0.3 Left; +0.3 Right'
'TXXX:Peak Level (Sample)'                          '+0.0 dB; +0.0 Left; +0.0 Right'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:Tool Name'                                    'Media Center'
'TXXX:Tool Version'                                 '20.0.132'
'TXXX:Volume Level (R128)'                          '-12.1062297821044922'
'TXXX:Volume Level (ReplayGain)'                    '-7.1062297821044922'
'TXXX:discogstags'                                  ['techno', 'electronic', 'experimental']
'TXXX:lastfmtags'                                   'techno'
'TXXX:p.list'                                       'pl.00'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '4'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '4'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+19.99 dB'
'TXXX:replaygain_track_peak'                        '0.046137'

========================== row from database ==========================
                                              'id'  1298387
                                            'path'  /data/Music/Bulk/00poprockelectronic/Dark - Techno/Demian Licht - Sin ss.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  299
                                           'genre'  electronic-th-techno
                                        'filesize'  12222381
                                           'mtime'  1620568825
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic ss electronic th techno
                                      'tag_artist'  Demian Licht
                                     'tag_release'  Dark Techno
                                       'tag_title'  Sin
                                             'bpm'  123.0
                                    'search_title'  'sin':1
                                   'search_artist'  'demian':1 'licht':2
                                  'search_release'  'dark':1 'techno':2
                                     'search_rest'  '00poprockelectronic':1 'electronic':3 'ss':2 'techno':5 'th':4
                                    'search_combo'  '00poprockelectronic':6 'dark':4C 'demian':2B 'electronic':8 'licht':3B 'sin':1A 'ss':7 'techno':5C,10 'th':9
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  9B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-4', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-4', 'q-chart-2', 'q-other-4', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['techno']
                                        'tag_date'  2015
                                     'discogstags'  ['techno', 'electronic', 'experimental']

============================== file details ==============================
                                           'mtime'  1620568825.319315  (2021-05-09 16:00:25)
                             'size'  12222381