======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '109'
                                          'artist'  'Mark Peters & The Silhouettes'
                                     'text_people'  ''
                                         'release'  "Greasy Rock'n'Roll  Vol. 09"
                                           'title'  'Someday'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'q-syn-2', 'q-bass-4', 'q-busy-3', "
 "'q-grit-2', 'q-play-3', 'Q-OLDST-2', 'q-chart-1', 'q-drums-2', 'q-other-3', "
 "'q-piano-1', 'q-vocals-3', 'Q-HHRNBTT-1', 'q-mixbeat-1', 'Q-LOCALNESS-1']")
                                      'lastfmtags'  "['beat', '60s']"
                                     'discogstags'  "['pop', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '16'
                                      'tracktotal'  ''
                                            'date'  '1960'
                                        'comments'  ''
                                           'genre'  'rock-pop-surf'
                                             'bpm'  '144.3'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:iTunNORM:eng'                                 (' 00000332 000003F2 00001018 000013DD 000088C7 000088DE 000035E3 000033BF '
 '00011700 00010AAA')
'PRIV:AverageLevel:{\x15\x00\x00'                   PRIV(owner='AverageLevel', data=b'{\x15\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))                     '144.3'
'TCON' (Content type, a.k.a. Genre)                 'rock-pop-surf'
'TDRC' (Recording time)                             '1960'
'TIT2' (Title/songname/content description)         'Someday'
'TKEY' (Initial key)                                '12B'
'TPE1' (Lead performer(s)/Soloist(s))               'Mark Peters & The Silhouettes'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '16'
'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'                                  ['pop', 'rock']
'TXXX:lastfmtags'                                   ['beat', '60s']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'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'                        '+0.09 dB'
'TXXX:replaygain_track_peak'                        '0.421016'

========================== row from database ==========================
                                              'id'  1531857
                                            'path'  /data/Music/Bulk/00popandrock-punk-garage-surf-stoner/Kip Tyler - va - Greasy Rock_n_Roll  Vol. 09/B8 - Mark Peters & The Silhouettes - Someday.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  109
                                           'genre'  rock-pop-surf
                                        'filesize'  1831265
                                           'mtime'  1620736969
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock punk garage surf stoner Kip Tyler va Rock_n_Roll B8 rock pop surf
                                      'tag_artist'  Mark Peters & The Silhouettes
                                     'tag_release'  Greasy Rock'n'Roll  Vol. 09
                                       'tag_title'  Someday
                                             'bpm'  144.3
                                    'search_title'  'someday':1
                                   'search_artist'  'mark':1 'peters':2 'silhouettes':4 'the':3
                                  'search_release'  'greasy':1 'n':3 'rock':2 'rocknroll':5 'roll':4 'vol':6,7
                                     'search_rest'  'b8':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'  'b8':23 'garage':14 'greasy':6C 'kip':17 'mark':2B 'n':8C,21 'peters':3B 'pop':25 'punk':13 'rock':7C,20,24 'rocknroll':10C 'roll':9C,22 'silhouettes':5B 'someday':1A 'stoner':16 'surf':15 'the':4B 'tyler':18 'va':19 'vol':11C,12C
                                    'tag_tracknum'  16
                                      'num_images'  1
                                             'key'  12B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['beat', '60s']
                                        'tag_date'  1960
                                     'discogstags'  ['pop', 'rock']

============================== file details ==============================
                                           'mtime'  1620736969.478332  (2021-05-11 14:42:49)
                             'size'  1831265