======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '312'
                                          'artist'  'Passport'
                                     'text_people'  'Klaus Doldinger'
                                         'release'  'Progsoup 40'
                                           'title'  'Infinity Machine'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['fusion', 'jazz', 'progressive rock', 'jazz fusion', 'jazz rock']"
                                     'discogstags'  "['jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  ''
                                            'date'  '1976'
                                        'comments'  ''
                                           'genre'  'rock-cppex-progressive;set-pl-progspace'
                                             'bpm'  '110.422'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:XXX'                            ' 000006A6 000005C1 00002961'
'COMM:iTunNORM:eng'                                 (' 000006A6 000005C1 00002961 00004A3A 0002E94E 0003DC4C 00005C9D 000071F8 '
 '00022463 000309C7')
'POPM:Windows Media Player 9 Series'                POPM(email='Windows Media Player 9 Series', rating=255, count=0)
'PRIV:AverageLevel:{\x0e\x00\x00'                   PRIV(owner='AverageLevel', data=b'{\x0e\x00\x00')
'PRIV:PeakValue:¡q\x00\x00'                         PRIV(owner='PeakValue', data=b'\xa1q\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 \x001\x006\x004\x006\x004\x002\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x00 \x00 \x008\x004\x002\x005\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x00 \x005\x002\x008\x000\x005\x006\x00\x00\x00'  PRIV(owner='WM/UniqueFileIdentifier', data=b'A\x00M\x00G\x00a\x00_\x00i\x00d\x00=\x00R\x00 \x00 \x00 \x001\x006\x004\x006\x004\x002\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x00 \x00 \x008\x004\x002\x005\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x00 \x005\x002\x008\x000\x005\x006\x00\x00\x00')
'PRIV:WM/WMCollectionGroupID:U¶¤kºÁ\x92H\x99Z¢Fö7\x8fY'  PRIV(owner='WM/WMCollectionGroupID', data=b'U\xb6\xa4k\xba\xc1\x92H\x99Z\xa2F\xf67\x8fY')
'PRIV:WM/WMCollectionID:U¶¤kºÁ\x92H\x99Z¢Fö7\x8fY'  PRIV(owner='WM/WMCollectionID', data=b'U\xb6\xa4k\xba\xc1\x92H\x99Z\xa2F\xf67\x8fY')
'PRIV:WM/WMContentID:\x13Xy\x81]EûE\x9dÄÊ)8ºÂr'     PRIV(owner='WM/WMContentID', data=b'\x13Xy\x81]E\xfbE\x9d\xc4\xca)8\xba\xc2r')
'TALB' (Album/Movie/Show title)                     'Progsoup 40'
'TBPM' (BPM (beats per minute))                     '110.422'
'TCOM' (Composer)                                   'Klaus Doldinger'
'TCON' (Content type, a.k.a. Genre)                 ['rock-cppex-progressive', 'set-pl-progspace']
'TDRC' (Recording time)                             '1976'
'TIT2' (Title/songname/content description)         'Infinity Machine'
'TKEY' (Initial key)                                '7B'
'TLEN' (Length)                                     '312000'
'TPE1' (Lead performer(s)/Soloist(s))               'Passport'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPUB' (Publisher)                                  'JVC Victor'
'TRCK' (Track number/Position in set)               '1'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  'jazz'
'TXXX:lastfmtags'                                   ['fusion', 'jazz', 'progressive rock', 'jazz fusion', 'jazz rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'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'                                     '1'
'TXXX:replaygain_track_gain'                        '-1.06 dB'
'TXXX:replaygain_track_peak'                        '0.629596'

========================== row from database ==========================
                                              'id'  1412347
                                            'path'  /data/Music/Bulk/00popandrock-classicprogpsy/PROGSOUP/progsoup 40/2301 passport - infinity machine.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  312
                                           'genre'  rock-cppex-progressive;set-pl-progspace
                                        'filesize'  7520128
                                           'mtime'  1620737323
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock classicprogpsy PROGSOUP progsoup 2301 passport infinity machine rock cppex progressive;set pl progspace
                                      'tag_artist'  Passport
                                     'tag_release'  Progsoup 40
                                       'tag_title'  Infinity Machine
                                             'bpm'  110.422
                                    'search_title'  'infinity':1 'machine':2
                                   'search_artist'  'passport':1
                                  'search_release'  '40':2 'progsoup':1
                                     'search_rest'  '2301':3 'classicprogpsy':1 'cppex':8 'infinity':5 'machine':6 'passport':4 'pl':13 'progressive':9,11 'progsoup':2 'progspace':14 'rock':7 'set':10,12
                                    'search_combo'  '2301':8 '40':5C 'classicprogpsy':6 'cppex':13 'infinity':1A,10 'machine':2A,11 'passport':3B,9 'pl':18 'progressive':14,16 'progsoup':4C,7 'progspace':19 'rock':12 'set':15,17
                                    'tag_tracknum'  1
                                      'num_images'  1
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['fusion', 'jazz', 'progressive rock', 'jazz fusion', 'jazz rock']
                                        'tag_date'  1976
                                     'discogstags'  ['jazz']

============================== file details ==============================
                                           'mtime'  1620737323.4923708  (2021-05-11 14:48:43)
                             'size'  7520128