======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '73'
                                          'artist'  'Jethro Tull'
                                     'text_people'  'Ian Anderson'
                                         'release'  'Aqualung'
                                           'title'  'Slipstream'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['folk rock', 'rock', 'progressive rock', 'progressive', 'classic rock']"
                                     'discogstags'  "['rock', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '9'
                                      'tracktotal'  ''
                                            'date'  '1999'
                                        'comments'  ''
                                           'genre'  'rock-cppex-classic;rock-cppex-progressive'
                                             'bpm'  '138.797'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'COMM:iTunNORM:eng'                                 (' 00000070 0000008E 000007CC 00000A48 00008882 00008D39 00004026 00004B33 '
 '00008D39 00008853')
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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')
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'PRIV:WM/WMCollectionGroupID:9<âü\x01ºa@¾\x1cCãè§Ü\x8f'  PRIV(owner='WM/WMCollectionGroupID', data=b'9<\xe2\xfc\x01\xbaa@\xbe\x1cC\xe3\xe8\xa7\xdc\x8f')
'PRIV:WM/WMCollectionID:9<âü\x01ºa@¾\x1cCãè§Ü\x8f'  PRIV(owner='WM/WMCollectionID', data=b'9<\xe2\xfc\x01\xbaa@\xbe\x1cC\xe3\xe8\xa7\xdc\x8f')
'PRIV:WM/WMContentID:$iߥ\x90bÈI¹Ä|Ñ·ì÷\x02'        PRIV(owner='WM/WMContentID', data=b'$i\xdf\xa5\x90b\xc8I\xb9\xc4|\xd1\xb7\xec\xf7\x02')
'TALB' (Album/Movie/Show title)                     'Aqualung'
'TBPM' (BPM (beats per minute))                     '138.797'
'TCOM' (Composer)                                   'Ian Anderson'
'TCON' (Content type, a.k.a. Genre)                 ['rock-cppex-classic', 'rock-cppex-progressive']
'TDRC' (Recording time)                             '1999'
'TIT2' (Title/songname/content description)         'Slipstream'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Jethro Tull'
'TPE2' (Band/orchestra/accompaniment)               'Jethro Tull'
'TPUB' (Publisher)                                  'Caroline'
'TRCK' (Track number/Position in set)               '9'
'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'                                  ['rock', 'classic rock']
'TXXX:lastfmtags'                                   ['folk rock', 'rock', 'progressive rock', 'progressive', 'classic rock']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '1'
'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'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.34 dB'
'TXXX:replaygain_track_peak'                        '0.988076'

========================== row from database ==========================
                                              'id'  1357465
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/08 slipstream.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  73
                                           'genre'  rock-cppex-classic;rock-cppex-progressive
                                        'filesize'  1765679
                                           'mtime'  1636039342
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] 08 slipstream rock cppex classic;rock cppex progressive
                                      'tag_artist'  Jethro Tull
                                     'tag_release'  Aqualung
                                       'tag_title'  Slipstream
                                             'bpm'  138.797
                                    'search_title'  'slipstream':1
                                   'search_artist'  'jethro':1 'tull':2
                                  'search_release'  'aqualung':1
                                     'search_rest'  '00poprockelectronic':1 'classic':10,12 'cppex':9 'files':5,6 'loose':3,4 'progressive':14 'rock':8,11,13 'slipstream':7 'unsorted':2
                                    'search_combo'  '00poprockelectronic':5 'aqualung':4C 'classic':14,16 'cppex':13 'files':9,10 'jethro':2B 'loose':7,8 'progressive':18 'rock':12,15,17 'slipstream':1A,11 'tull':3B 'unsorted':6
                                    'tag_tracknum'  9
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', '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-1', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['folk rock', 'rock', 'progressive rock', 'progressive', 'classic rock']
                                        'tag_date'  1999
                                     'discogstags'  ['rock', 'classic rock']

============================== file details ==============================
                                           'mtime'  1636039342.055743  (2021-11-04 16:22:22)
                             'size'  1765679