======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '100'
                                          'artist'  'The Scorpions'
                                     'text_people'  ''
                                         'release'  "Greasy Rock'n'Roll  Vol. 09"
                                           'title'  'Keep-A-Knockin'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-1', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['hard rock', '80s', 'classic rock', 'metal', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '15'
                                      'tracktotal'  ''
                                            'date'  '1960'
                                        'comments'  ''
                                           'genre'  'rock-pop-surf'
                                             'bpm'  '123.5'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:iTunNORM:eng'                                 (' 00000301 0000044B 00001608 00001E73 00011430 00011430 00003562 00003614 '
 '000141D0 000141D0')
'PRIV:AverageLevel:{\x12\x00\x00'                   PRIV(owner='AverageLevel', data=b'{\x12\x00\x00')
'PRIV:PeakValue:¡\x7f\x00\x00'                      PRIV(owner='PeakValue', data=b'\xa1\x7f\x00\x00')
'TALB' (Album/Movie/Show title)                     "Greasy Rock'n'Roll  Vol. 09"
'TBPM' (BPM (beats per minute))                     '123.5'
'TCON' (Content type, a.k.a. Genre)                 'rock-pop-surf'
'TDRC' (Recording time)                             '1960'
'TIT2' (Title/songname/content description)         'Keep-A-Knockin'
'TKEY' (Initial key)                                '7B'
'TPE1' (Lead performer(s)/Soloist(s))               'The Scorpions'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '15'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['hard rock', '80s', 'classic rock', 'metal', 'rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.75 dB'
'TXXX:replaygain_track_peak'                        '0.422511'

========================== row from database ==========================
                                              'id'  1525823
                                            'path'  /data/Music/Bulk/00popandrock-punk-garage-surf-stoner/Kip Tyler - va - Greasy Rock_n_Roll  Vol. 09/B7 - The Scorpions - Keep-A-Knockin.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  100
                                           'genre'  rock-pop-surf
                                        'filesize'  1688741
                                           'mtime'  1620736969
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock punk garage surf stoner Kip Tyler va Rock_n_Roll B7 rock pop surf
                                      'tag_artist'  The Scorpions
                                     'tag_release'  Greasy Rock'n'Roll  Vol. 09
                                       'tag_title'  Keep-A-Knockin
                                             'bpm'  123.5
                                    'search_title'  'a':2 'keep':1 'keepaknockin':4 'knockin':3
                                   'search_artist'  'scorpions':2 'the':1
                                  'search_release'  'greasy':1 'n':3 'rock':2 'rocknroll':5 'roll':4 'vol':6,7
                                     'search_rest'  'b7':11 'garage':2 'kip':5 'n':9 'pop':13 'punk':1 'rock':8,12 'roll':10 'stoner':4 'surf':3 'tyler':6 'va':7
                                    'search_combo'  'a':2A 'b7':24 'garage':15 'greasy':7C 'keep':1A 'keepaknockin':4A 'kip':18 'knockin':3A 'n':9C,22 'pop':26 'punk':14 'rock':8C,21,25 'rocknroll':11C 'roll':10C,23 'scorpions':6B 'stoner':17 'surf':16 'the':5B 'tyler':19 'va':20 'vol':12C,13C
                                    'tag_tracknum'  15
                                      'num_images'  1
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['hard rock', '80s', 'classic rock', 'metal', 'rock']
                                        'tag_date'  1960
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620736969.3833926  (2021-05-11 14:42:49)
                             'size'  1688741