======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '253'
                                          'artist'  'Heart'
                                     'text_people'  'Mark Mueller'
                                         'release'  'Heart'
                                           'title'  "Nothin' at All"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['hard rock', '80s', 'rock', 'female vocalists', 'classic rock']"
                                     'discogstags'  "['rock', 'pop rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '8'
                                      'tracktotal'  ''
                                            'date'  '1985'
                                        'comments'  ''
                                           'genre'  'rock-cppex-classic'
                                             'bpm'  '123.859'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'MCDI' (Music CD identifier)                        MCDI(data=b'A\x00+\x009\x006\x00+\x004\x002\x004\x002\x00+\x008\x002\x00F\x00F\x00+\x00C\x00B\x006\x006\x00+\x001\x001\x006\x002\x005\x00+\x001\x005\x00D\x00A\x00B\x00+\x001\x00A\x002\x00F\x00E\x00+\x001\x00E\x00B\x009\x000\x00+\x002\x003\x005\x00F\x005\x00+\x002\x007\x006\x00B\x004\x00+\x002\x00B\x008\x009\x00A\x00\x00\x00')
'PRIV:AverageLevel:{\x11\x00\x00'                   PRIV(owner='AverageLevel', data=b'{\x11\x00\x00')
'PRIV:PeakValue:!d\x00\x00'                         PRIV(owner='PeakValue', data=b'!d\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 \x00 \x009\x001\x002\x001\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x00 \x00 \x004\x004\x006\x003\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x003\x001\x004\x003\x007\x002\x000\x00\x00\x00'  PRIV(owner='WM/UniqueFileIdentifier', data=b'A\x00M\x00G\x00a\x00_\x00i\x00d\x00=\x00R\x00 \x00 \x00 \x00 \x00 \x009\x001\x002\x001\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x00 \x00 \x004\x004\x006\x003\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x003\x001\x004\x003\x007\x002\x000\x00\x00\x00')
'PRIV:WM/WMCollectionGroupID:Ø\x85ì\r\x92,ìE\x92ZE\x8d\x1fâ\x93\x1c'  PRIV(owner='WM/WMCollectionGroupID', data=b'\xd8\x85\xec\r\x92,\xecE\x92ZE\x8d\x1f\xe2\x93\x1c')
'PRIV:WM/WMCollectionID:Ø\x85ì\r\x92,ìE\x92ZE\x8d\x1fâ\x93\x1c'  PRIV(owner='WM/WMCollectionID', data=b'\xd8\x85\xec\r\x92,\xecE\x92ZE\x8d\x1f\xe2\x93\x1c')
'PRIV:WM/WMContentID:·à"â½b\x8bJ\x92\x85ù\x94H:]B'  PRIV(owner='WM/WMContentID', data=b'\xb7\xe0"\xe2\xbdb\x8bJ\x92\x85\xf9\x94H:]B')
'TALB' (Album/Movie/Show title)                     'Heart'
'TBPM' (BPM (beats per minute))                     '123.859'
'TCOM' (Composer)                                   'Mark Mueller'
'TCON' (Content type, a.k.a. Genre)                 'rock-cppex-classic'
'TDRC' (Recording time)                             '1985'
'TIT2' (Title/songname/content description)         "Nothin' at All"
'TKEY' (Initial key)                                '9B'
'TLEN' (Length)                                     '253933'
'TPE1' (Lead performer(s)/Soloist(s))               'Heart'
'TPE2' (Band/orchestra/accompaniment)               'Heart'
'TPUB' (Publisher)                                  'Epic'
'TRCK' (Track number/Position in set)               '8'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['rock', 'pop rock']
'TXXX:lastfmtags'                                   ['hard rock', '80s', 'rock', 'female vocalists', 'classic rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.31 dB'
'TXXX:replaygain_track_peak'                        '0.503579'

========================== row from database ==========================
                                              'id'  1500280
                                            'path'  /data/Music/Bulk/00poprockelectronic/Heart/1985 - Heart/08 Nothin_ at All.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  253
                                           'genre'  rock-cppex-classic
                                        'filesize'  10622946
                                           'mtime'  1636039210
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 1985 08 Nothin_ rock cppex classic
                                      'tag_artist'  Heart
                                     'tag_release'  Heart
                                       'tag_title'  Nothin' at All
                                             'bpm'  123.859
                                    'search_title'  'all':4 'at':3 'nothin':1,2
                                   'search_artist'  'heart':1
                                  'search_release'  'heart':1
                                     'search_rest'  '00poprockelectronic':1 '1985':2 'classic':6 'cppex':5 'nothin':3 'rock':4
                                    'search_combo'  '00poprockelectronic':7 '1985':8 'all':4A 'at':3A 'classic':12 'cppex':11 'heart':5B,6C 'nothin':1A,2A,9 'rock':10
                                    'tag_tracknum'  8
                                      'num_images'  1
                                             'key'  9B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['hard rock', '80s', 'rock', 'female vocalists', 'classic rock']
                                        'tag_date'  1985
                                     'discogstags'  ['rock', 'pop rock']

============================== file details ==============================
                                           'mtime'  1636039209.5349572  (2021-11-04 16:20:09)
                             'size'  10622946