======================== unified (from filesystem) ========================
                                         'bitrate'  '189.941'
                                        'duration'  '199'
                                          'artist'  'Johnny Cash'
                                     'text_people'  'Gore, Martin Lee'
                                         'release'  'Ring Of Fire (The Legend Of Johnny Cash)'
                                           'title'  'Personal Jesus'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-OLDST-3', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-3', 'q-syn-1', 'q-bass-3', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['country', 'singer songwritergdchill', 'cover', 'singer songwriter']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '18'
                                      'tracktotal'  ''
                                            'date'  '2005'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country'
                                             'bpm'  '123.032'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'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 \x008\x002\x004\x003\x000\x004\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x00 \x00 \x001\x005\x004\x008\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x009\x000\x003\x003\x005\x004\x004\x00\x00\x00'  PRIV(owner='WM/UniqueFileIdentifier', data=b'A\x00M\x00G\x00a\x00_\x00i\x00d\x00=\x00R\x00 \x00 \x00 \x008\x002\x004\x003\x000\x004\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x00 \x00 \x001\x005\x004\x008\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x009\x000\x003\x003\x005\x004\x004\x00\x00\x00')
'PRIV:WM/WMCollectionGroupID:\x847Éò\x0bú\x87N\x8f´}\x92\x1cïôí'  PRIV(owner='WM/WMCollectionGroupID', data=b'\x847\xc9\xf2\x0b\xfa\x87N\x8f\xb4}\x92\x1c\xef\xf4\xed')
'PRIV:WM/WMCollectionID:\x847Éò\x0bú\x87N\x8f´}\x92\x1cïôí'  PRIV(owner='WM/WMCollectionID', data=b'\x847\xc9\xf2\x0b\xfa\x87N\x8f\xb4}\x92\x1c\xef\xf4\xed')
'PRIV:WM/WMContentID:§²ÎÓ\x07\x81pLªüã?"E\x80Å'     PRIV(owner='WM/WMContentID', data=b'\xa7\xb2\xce\xd3\x07\x81pL\xaa\xfc\xe3?"E\x80\xc5')
'PRIV:http://www.cdtag.com:\x02\x00½\x1dÑ\x00'      PRIV(owner='http://www.cdtag.com', data=b'\x02\x00\xbd\x1d\xd1\x00')
'TALB' (Album/Movie/Show title)                     'Ring Of Fire (The Legend Of Johnny Cash)'
'TBPM' (BPM (beats per minute))                     '123.032'
'TCOM' (Composer)                                   'Gore, Martin Lee'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TDRC' (Recording time)                             '2005'
'TIT2' (Title/songname/content description)         'Personal Jesus'
'TKEY' (Initial key)                                '9A'
'TLAN' (Language(s))                                'eng'
'TPE1' (Lead performer(s)/Soloist(s))               'Johnny Cash'
'TPE2' (Band/orchestra/accompaniment)               'Johnny Cash'
'TPUB' (Publisher)                                  'Universal'
'TRCK' (Track number/Position in set)               '18'
'TSSE' (Software/Hardware and settings used for encoding)  'LAME v3.90.3 --alt-preset standard'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:Release type'                                 'Normal release'
'TXXX:Rip date'                                     '2006-01-08'
'TXXX:Source'                                       'CD'
'TXXX:lastfmtags'                                   ['country', 'singer songwritergdchill', 'cover', 'singer songwriter']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.50 dB'
'TXXX:replaygain_track_peak'                        '0.346464'

========================== row from database ==========================
                                              'id'  1494493
                                            'path'  /data/Music/Bulk/00localcharacter/Johnny Cash - Johnny_Cash-Ring_Of_Fire_(The_Legend_Of_Johnny_Cash)-2005/18-johnny_cash-personal_jesus.mp3
                                         'working'  None
                                         'bitrate'  190
                                    'duration_sec'  199
                                           'genre'  loc-namerica-country
                                        'filesize'  4734382
                                           'mtime'  1621629726
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter Johnny_Cash Ring_Of_Fire_(The_Legend_Of_Johnny_Cash) 2005 18 johnny_cash personal_jesus loc namerica country
                                      'tag_artist'  Johnny Cash
                                     'tag_release'  Ring Of Fire (The Legend Of Johnny Cash)
                                       'tag_title'  Personal Jesus
                                             'bpm'  123.032
                                    'search_title'  'jesus':2 'personal':1
                                   'search_artist'  'cash':2 'johnny':1
                                  'search_release'  'cash':8,9 'fire':3 'johnny':7 'legend':6 'of':2 'ring':1 'the':4,5
                                     'search_rest'  '18':20 '2005':19 'cash':2,10,18 'country':25 'fire':5,13 'jesus':22 'johnny':1,9,17 'legend':7,15 'loc':23 'namerica':24 'of':4,8,12,16 'personal':21 'ring':3,11 'the':6,14
                                    'search_combo'  '18':33 '2005':32 'cash':4B,12C,13C,15,23,31 'country':38 'fire':7C,18,26 'jesus':2A,35 'johnny':3B,11C,14,22,30 'legend':10C,20,28 'loc':36 'namerica':37 'of':6C,17,21,25,29 'personal':1A,34 'ring':5C,16,24 'the':8C,9C,19,27
                                    'tag_tracknum'  18
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-3', 'q-syn-1', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['country', 'singer songwritergdchill', 'cover', 'singer songwriter']
                                        'tag_date'  2005
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621629726.307579  (2021-05-21 22:42:06)
                             'size'  4734382