======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '168'
                                          'artist'  'Chuck Berry'
                                     'text_people'  'Chuck Berry'
                                         'release'  'The Great Twenty-Eight'
                                           'title'  'Carol'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-3', 'q-other-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['rock and roll', 'rock n roll', 'blues', 'rock', 'classic rock']"
                                     'discogstags'  "['rock', 'rock & roll']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '15'
                                      'tracktotal'  ''
                                            'date'  '1958'
                                        'comments'  ''
                                           'genre'  'rock-pop-early'
                                             'bpm'  '104.714'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'COMM::eng'                                         '58-150 POS 18'
'COMM:ID3v1 Comment:XXX'                            '58-150 POS 18'
'MCDI' (Music CD identifier)                        MCDI(data=b'1\x00C\x00+\x009\x006\x00+\x002\x00A\x005\x00D\x00+\x005\x004\x00A\x006\x00+\x008\x004\x00D\x007\x00+\x00B\x008\x001\x007\x00+\x00E\x000\x005\x003\x00+\x001\x000\x00A\x00A\x004\x00+\x001\x004\x001\x008\x001\x00+\x001\x007\x001\x001\x007\x00+\x001\x009\x00D\x00B\x008\x00+\x001\x00C\x00C\x001\x001\x00+\x002\x000\x005\x007\x008\x00+\x002\x003\x00A\x00C\x005\x00+\x002\x006\x009\x00C\x00B\x00+\x002\x009\x009\x001\x009\x00+\x002\x00C\x00A\x007\x004\x00+\x002\x00F\x000\x008\x000\x00+\x003\x001\x007\x008\x00B\x00+\x003\x004\x001\x005\x009\x00+\x003\x007\x001\x002\x002\x00+\x003\x009\x00A\x007\x008\x00+\x003\x00C\x005\x00A\x000\x00+\x003\x00E\x005\x003\x00A\x00+\x004\x000\x009\x00E\x003\x00+\x004\x002\x009\x008\x007\x00+\x004\x004\x00A\x000\x007\x00+\x004\x007\x007\x009\x003\x00+\x004\x00A\x007\x002\x007\x00+\x004\x00C\x00E\x002\x008\x00\x00\x00')
'PRIV:AverageLevel:«\x0f\x00\x00'                   PRIV(owner='AverageLevel', data=b'\xab\x0f\x00\x00')
'PRIV:PeakValue:ÿ\x7f\x00\x00'                      PRIV(owner='PeakValue', data=b'\xff\x7f\x00\x00')
'PRIV:WM/MediaClassPrimaryID:¼}`Ñ#ãâK\x86¡H¤*(D\x1e'  PRIV(owner='WM/MediaClassPrimaryID', data=b'\xbc}`\xd1#\xe3\xe2K\x86\xa1H\xa4*(D\x1e')
'PRIV:WM/MediaClassSecondaryID:\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'  PRIV(owner='WM/MediaClassSecondaryID', data=b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
'PRIV:WM/Provider:A\x00M\x00G\x00\x00\x00'          PRIV(owner='WM/Provider', data=b'A\x00M\x00G\x00\x00\x00')
'PRIV:WM/UniqueFileIdentifier:A\x00M\x00G\x00a\x00_\x00i\x00d\x00=\x00R\x00 \x00 \x00 \x00 \x00 \x001\x007\x007\x009\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x00 \x00 \x003\x006\x006\x004\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x00 \x006\x005\x002\x006\x008\x001\x00\x00\x00'  PRIV(owner='WM/UniqueFileIdentifier', data=b'A\x00M\x00G\x00a\x00_\x00i\x00d\x00=\x00R\x00 \x00 \x00 \x00 \x00 \x001\x007\x007\x009\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x00 \x00 \x003\x006\x006\x004\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x00 \x006\x005\x002\x006\x008\x001\x00\x00\x00')
'PRIV:WM/WMCollectionGroupID:\x8dÚ:êÊÚJF¡s5¡\x18\x85ô\x8b'  PRIV(owner='WM/WMCollectionGroupID', data=b'\x8d\xda:\xea\xca\xdaJF\xa1s5\xa1\x18\x85\xf4\x8b')
'PRIV:WM/WMCollectionID:\x8dÚ:êÊÚJF¡s5¡\x18\x85ô\x8b'  PRIV(owner='WM/WMCollectionID', data=b'\x8d\xda:\xea\xca\xdaJF\xa1s5\xa1\x18\x85\xf4\x8b')
'PRIV:WM/WMContentID:ÈS\x99ôÛûçK¼n\x98!AoC\r'       PRIV(owner='WM/WMContentID', data=b'\xc8S\x99\xf4\xdb\xfb\xe7K\xbcn\x98!AoC\r')
'TALB' (Album/Movie/Show title)                     'The Great Twenty-Eight'
'TBPM' (BPM (beats per minute))                     '104.714'
'TCOM' (Composer)                                   'Chuck Berry'
'TCON' (Content type, a.k.a. Genre)                 'rock-pop-early'
'TDRC' (Recording time)                             '1958'
'TIT2' (Title/songname/content description)         'Carol'
'TKEY' (Initial key)                                '6A'
'TLEN' (Length)                                     '168466'
'TPE1' (Lead performer(s)/Soloist(s))               'Chuck Berry'
'TPE2' (Band/orchestra/accompaniment)               'Chuck Berry'
'TPUB' (Publisher)                                  'Chess'
'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'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['rock', 'rock & roll']
'TXXX:lastfmtags'                                   ['rock and roll', 'rock n roll', 'blues', 'rock', 'classic rock']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.04 dB'
'TXXX:replaygain_track_peak'                        '0.711568'

========================== row from database ==========================
                                              'id'  1443179
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1958/58-150 - Chuck Berry - Carol.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  168
                                           'genre'  rock-pop-early
                                        'filesize'  6742227
                                           'mtime'  1620736370
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1958 58 150 rock pop early
                                      'tag_artist'  Chuck Berry
                                     'tag_release'  The Great Twenty-Eight
                                       'tag_title'  Carol
                                             'bpm'  104.714
                                    'search_title'  'carol':1
                                   'search_artist'  'berry':2 'chuck':1
                                  'search_release'  'eight':4 'great':2 'the':1 'twenty':3 'twentyeight':5
                                     'search_rest'  '00oldiepop':5 '150':8 '1958':6 '58':7 'country':4 'early':11 'exotica':2 'jazz':1 'oldies':3 'pop':10 'rock':9
                                    'search_combo'  '00oldiepop':13 '150':16 '1958':14 '58':15 'berry':3B 'carol':1A 'chuck':2B 'country':12 'early':19 'eight':7C 'exotica':10 'great':5C 'jazz':9 'oldies':11 'pop':18 'rock':17 'the':4C 'twenty':6C 'twentyeight':8C
                                    'tag_tracknum'  15
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['rock and roll', 'rock n roll', 'blues', 'rock', 'classic rock']
                                        'tag_date'  1958
                                     'discogstags'  ['rock', 'rock & roll']

============================== file details ==============================
                                           'mtime'  1620736370.472809  (2021-05-11 14:32:50)
                             'size'  6742227