======================== unified (from filesystem) ========================
                                         'bitrate'  '189.56'
                                        'duration'  '241'
                                          'artist'  'Hauschka'
                                     'text_people'  ''
                                         'release'  'Ferndorf'
                                           'title'  'Rode Null'
                                           'quals'  ("['q-piano-2', 'Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', "
 "'Q-HHRNBTT-1', 'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', "
 "'q-play-3', 'q-chart-2', 'q-drums-1', 'q-other-4', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['instrumental', 'contemporary classical', 'piano', 'experimental', 'ambient']"
                                     'discogstags'  "['electronic', 'classical', 'modern classical', 'experimental']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  ''
                                            'date'  '2008'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '93.285'
                                             'key'  '8B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'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 \x001\x004\x002\x006\x004\x002\x008\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x007\x002\x008\x005\x009\x001\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x001\x004\x009\x006\x007\x001\x000\x008\x00\x00\x00'  PRIV(owner='WM/UniqueFileIdentifier', data=b'A\x00M\x00G\x00a\x00_\x00i\x00d\x00=\x00R\x00 \x00 \x001\x004\x002\x006\x004\x002\x008\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x007\x002\x008\x005\x009\x001\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x001\x004\x009\x006\x007\x001\x000\x008\x00\x00\x00')
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'PRIV:WM/WMCollectionID:ð§\rN<$sB¨E>K½\x03·ã'       PRIV(owner='WM/WMCollectionID', data=b'\xf0\xa7\rN<$sB\xa8E>K\xbd\x03\xb7\xe3')
'PRIV:WM/WMContentID:|lL:\x8a\x16ÐD\xadÏ\x0e\x83\x10\x11®Í'  PRIV(owner='WM/WMContentID', data=b'|lL:\x8a\x16\xd0D\xad\xcf\x0e\x83\x10\x11\xae\xcd')
'TALB' (Album/Movie/Show title)                     'Ferndorf'
'TBPM' (BPM (beats per minute))                     '93.285'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDRC' (Recording time)                             '2008'
'TIT2' (Title/songname/content description)         'Rode Null'
'TKEY' (Initial key)                                '8B'
'TPE1' (Lead performer(s)/Soloist(s))               'Hauschka'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'FatCat Records'
'TRCK' (Track number/Position in set)               '3'
'TXXX:ALBUM ARTIST'                                 'Hauschka'
'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'                                  ['electronic', 'classical', 'modern classical', 'experimental']
'TXXX:lastfmtags'                                   ['instrumental', 'contemporary classical', 'piano', 'experimental', 'ambient']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '2'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.30 dB'
'TXXX:replaygain_track_peak'                        '0.489806'

========================== row from database ==========================
                                              'id'  1353059
                                            'path'  /data/Music/Bulk/00instruments-classical/Hauschka/Ferndorf/03 rode null.mp3
                                         'working'  None
                                         'bitrate'  189
                                    'duration_sec'  241
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  5747933
                                           'mtime'  1620574183
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical 03 rode null prerock classical classical instruments
                                      'tag_artist'  Hauschka
                                     'tag_release'  Ferndorf
                                       'tag_title'  Rode Null
                                             'bpm'  93.285
                                    'search_title'  'null':2 'rode':1
                                   'search_artist'  'hauschka':1
                                  'search_release'  'ferndorf':1
                                     'search_rest'  '00instruments':1 'classical':2 'instruments':6 'null':4 'prerock':5 'rode':3
                                    'search_combo'  '00instruments':5 'classical':6 'ferndorf':4C 'hauschka':3B 'instruments':10 'null':2A,8 'prerock':9 'rode':1A,7
                                    'tag_tracknum'  3
                                      'num_images'  1
                                             'key'  8B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-2', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['instrumental', 'contemporary classical', 'piano', 'experimental', 'ambient']
                                        'tag_date'  2008
                                     'discogstags'  ['electronic', 'classical', 'modern classical', 'experimental']

============================== file details ==============================
                                           'mtime'  1620574182.58879  (2021-05-09 17:29:42)
                             'size'  5747933