======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '281'
                                          'artist'  'Graham Nash'
                                     'text_people'  'Graham Nash'
                                         'release'  'progsoup 50'
                                           'title'  'I Used to Be a King'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'Q-PLAY-3', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', "
 "'Q-PIANO-2', 'q-chart-2', 'q-drums-3', 'q-other-2', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['folk rock', 'rock', 'classic rock', 'csny', 'folk', 'singer songwriter']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '36'
                                      'tracktotal'  ''
                                            'date'  '1971'
                                        'comments'  ''
                                           'genre'  'rock-cppex-progressive'
                                             'bpm'  '113.517'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'MCDI' (Music CD identifier)                        MCDI(data=b'B\x00+\x00B\x006\x00+\x003\x004\x007\x008\x00+\x007\x007\x00E\x007\x00+\x009\x00E\x00E\x003\x00+\x00F\x001\x007\x009\x00+\x001\x002\x008\x00E\x000\x00+\x001\x005\x001\x005\x008\x00+\x001\x008\x002\x00D\x008\x00+\x001\x00C\x009\x008\x00F\x00+\x001\x00F\x00E\x005\x007\x00+\x002\x003\x000\x009\x001\x00+\x002\x004\x004\x001\x00B\x00\x00\x00')
'PRIV:AverageLevel:\x1e\x11\x00\x00'                PRIV(owner='AverageLevel', data=b'\x1e\x11\x00\x00')
'PRIV:PeakValue:ux\x00\x00'                         PRIV(owner='PeakValue', data=b'ux\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 \x001\x003\x007\x000\x000\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x00 \x00 \x004\x009\x009\x001\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x00 \x008\x000\x009\x009\x005\x004\x00\x00\x00'  PRIV(owner='WM/UniqueFileIdentifier', data=b'A\x00M\x00G\x00a\x00_\x00i\x00d\x00=\x00R\x00 \x00 \x00 \x00 \x001\x003\x007\x000\x000\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x00 \x00 \x004\x009\x009\x001\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x00 \x008\x000\x009\x009\x005\x004\x00\x00\x00')
'PRIV:WM/WMCollectionGroupID:-\x8e\x90v\x13\rëHµò\x0fL0i¯y'  PRIV(owner='WM/WMCollectionGroupID', data=b'-\x8e\x90v\x13\r\xebH\xb5\xf2\x0fL0i\xafy')
'PRIV:WM/WMCollectionID:-\x8e\x90v\x13\rëHµò\x0fL0i¯y'  PRIV(owner='WM/WMCollectionID', data=b'-\x8e\x90v\x13\r\xebH\xb5\xf2\x0fL0i\xafy')
'PRIV:WM/WMContentID:µy\x86¨\x0fÒìM³#$=ÆêÒ\x1d'     PRIV(owner='WM/WMContentID', data=b'\xb5y\x86\xa8\x0f\xd2\xecM\xb3#$=\xc6\xea\xd2\x1d')
'TALB' (Album/Movie/Show title)                     'progsoup 50'
'TBPM' (BPM (beats per minute))                     '113.517'
'TCOM' (Composer)                                   'Graham Nash'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex-progressive'
'TDRC' (Recording time)                             '1971'
'TIT2' (Title/songname/content description)         'I Used to Be a King'
'TKEY' (Initial key)                                '8A'
'TLEN' (Length)                                     '281893'
'TPE1' (Lead performer(s)/Soloist(s))               'Graham Nash'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPUB' (Publisher)                                  'Classic Compact Disc'
'TRCK' (Track number/Position in set)               '36'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['folk rock', 'rock', 'classic rock', 'csny', 'folk', 'singer songwriter']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.37 dB'
'TXXX:replaygain_track_peak'                        '0.657907'

========================== row from database ==========================
                                              'id'  1412795
                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/PROGSOUP/progsoup 50/2855 graham nash -  i used to be a king.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  281
                                           'genre'  rock-cppex-progressive
                                        'filesize'  11270156
                                           'mtime'  1620737532
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy PROGSOUP 2855 graham nash used be king rock cppex progressive
                                      'tag_artist'  Graham Nash
                                     'tag_release'  progsoup 50
                                       'tag_title'  I Used to Be a King
                                             'bpm'  113.517
                                    'search_title'  'a':5 'be':4 'i':1 'king':6 'to':3 'used':2
                                   'search_artist'  'graham':1 'nash':2
                                  'search_release'  '50':2 'progsoup':1
                                     'search_rest'  '2855':3 'be':7 'classicprogpsy':1 'cppex':10 'graham':4 'king':8 'nash':5 'progressive':11 'progsoup':2 'rock':9 'used':6
                                    'search_combo'  '2855':13 '50':10C 'a':5A 'be':4A,17 'classicprogpsy':11 'cppex':20 'graham':7B,14 'i':1A 'king':6A,18 'nash':8B,15 'progressive':21 'progsoup':9C,12 'rock':19 'to':3A 'used':2A,16
                                    'tag_tracknum'  36
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-2', 'Q-OLDST-2', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'Q-PLAY-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['folk rock', 'rock', 'classic rock', 'csny', 'folk', 'singer songwriter']
                                        'tag_date'  1971
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620737532.4704647  (2021-05-11 14:52:12)
                             'size'  11270156