======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '290'
                                          'artist'  'Amon Amarth'
                                     'text_people'  'Amon Amarth/Udo Sweinsnabel'
                                         'release'  'Versus the World Disc 1'
                                           'title'  'Across the Rainbow Bridge'
                                           'quals'  ("['Q-LOCALNESS-1', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-3', 'q-busy-4', 'q-grit-4', 'q-play-3', "
 "'q-chart-4', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['swedish', 'death metal', 'melodic death metal', 'viking metal', 'metal']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '5'
                                      'tracktotal'  ''
                                            'date'  '2002'
                                        'comments'  ''
                                           'genre'  'eid-metal-death;eid-metal-melodic'
                                             'bpm'  '118.221'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

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"PRIV:AverageLevel:'%\x00\x00"                      PRIV(owner='AverageLevel', data=b"'%\x00\x00")
'PRIV:PeakValue:ÿ\x7f\x00\x00'                      PRIV(owner='PeakValue', data=b'\xff\x7f\x00\x00')
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'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 \x006\x001\x001\x007\x001\x009\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x002\x008\x009\x005\x006\x005\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x006\x000\x000\x006\x007\x008\x002\x00\x00\x00'  PRIV(owner='WM/UniqueFileIdentifier', data=b'A\x00M\x00G\x00a\x00_\x00i\x00d\x00=\x00R\x00 \x00 \x00 \x006\x001\x001\x007\x001\x009\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x002\x008\x009\x005\x006\x005\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x006\x000\x000\x006\x007\x008\x002\x00\x00\x00')
'PRIV:WM/WMCollectionGroupID:\x11\x81®¯@\xadÍB\x976\x8d\x8d\x99ïÄÂ'  PRIV(owner='WM/WMCollectionGroupID', data=b'\x11\x81\xae\xaf@\xad\xcdB\x976\x8d\x8d\x99\xef\xc4\xc2')
'PRIV:WM/WMCollectionID:\x11\x81®¯@\xadÍB\x976\x8d\x8d\x99ïÄÂ'  PRIV(owner='WM/WMCollectionID', data=b'\x11\x81\xae\xaf@\xad\xcdB\x976\x8d\x8d\x99\xef\xc4\xc2')
'PRIV:WM/WMContentID:\x17Õ\x88DÝÄåJ\x81\xa0\x1e0<àc÷'  PRIV(owner='WM/WMContentID', data=b'\x17\xd5\x88D\xdd\xc4\xe5J\x81\xa0\x1e0<\xe0c\xf7')
'TALB' (Album/Movie/Show title)                     'Versus the World Disc 1'
'TBPM' (BPM (beats per minute))                     '118.221'
'TCOM' (Composer)                                   'Amon Amarth/Udo Sweinsnabel'
'TCON' (Content type, a.k.a. Genre)                 ['eid-metal-death', 'eid-metal-melodic']
'TDRC' (Recording time)                             '2002'
'TIT2' (Title/songname/content description)         'Across the Rainbow Bridge'
'TKEY' (Initial key)                                '9A'
'TLEN' (Length)                                     '290773'
'TPE1' (Lead performer(s)/Soloist(s))               'Amon Amarth'
'TPE2' (Band/orchestra/accompaniment)               'Amon Amarth'
'TPUB' (Publisher)                                  'Metal Blade'
'TRCK' (Track number/Position in set)               '5'
'TXXX:Q-HAP'                                        '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  'rock'
'TXXX:lastfmtags'                                   ['swedish', 'death metal', 'melodic death metal', 'viking metal', 'metal']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '4'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '4'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.33 dB'
'TXXX:replaygain_track_peak'                        '0.323189'

========================== row from database ==========================
                                              'id'  1391191
                                            'path'  /data/Music/Bulk/00dwimp/00metal/Amon Amarth/Versus The World/05 Across the Rainbow Bridge.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  290
                                           'genre'  eid-metal-death;eid-metal-melodic
                                        'filesize'  6971732
                                           'mtime'  1620301844
                                   'redo_metaread'  0
                                        'rest_str'   00dwimp 00metal The 05 eid metal death;eid metal melodic
                                      'tag_artist'  Amon Amarth
                                     'tag_release'  Versus the World Disc 1
                                       'tag_title'  Across the Rainbow Bridge
                                             'bpm'  118.221
                                    'search_title'  'across':1 'bridge':4 'rainbow':3 'the':2
                                   'search_artist'  'amarth':2 'amon':1
                                  'search_release'  '1':5 'disc':4 'the':2 'versus':1 'world':3
                                     'search_rest'  '00dwimp':1 '00metal':2 'death':6,8 'eid':4,7,9 'melodic':10 'metal':5 'the':3
                                    'search_combo'  '00dwimp':12 '00metal':13 '1':11C 'across':1A 'amarth':6B 'amon':5B 'bridge':4A 'death':17,19 'disc':10C 'eid':15,18,20 'melodic':21 'metal':16 'rainbow':3A 'the':2A,8C,14 'versus':7C 'world':9C
                                    'tag_tracknum'  5
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-4', 'q-drums-3', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-1', 'q-bass-3', 'q-grit-4']
                                      'lastfmtags'  ['swedish', 'death metal', 'melodic death metal', 'viking metal', 'metal']
                                        'tag_date'  2002
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1620301843.6908906  (2021-05-06 13:50:43)
                             'size'  6971732