======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '176'
                                          'artist'  'Lil Armstrong '
                                     'text_people'  'Lil Armstrong'
                                         'release'  '1936-1940'
                                           'title'  "Let's Get Happy Together"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'Q-PLAY-2', 'q-bass-2', 'q-busy-3', 'q-grit-1', "
 "'Q-PIANO-2', 'q-chart-1', 'q-drums-2', 'q-other-3', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['jazz', 'oldies', 'vocal jazz', 'acoustic', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '15'
                                      'tracktotal'  ''
                                            'date'  '1935'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-vocal'
                                             'bpm'  '89.770'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'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 \x002\x009\x000\x000\x008\x001\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x00 \x005\x002\x004\x007\x005\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x003\x007\x004\x000\x000\x004\x001\x00\x00\x00'  PRIV(owner='WM/UniqueFileIdentifier', data=b'A\x00M\x00G\x00a\x00_\x00i\x00d\x00=\x00R\x00 \x00 \x00 \x002\x009\x000\x000\x008\x001\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x00 \x005\x002\x004\x007\x005\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x003\x007\x004\x000\x000\x004\x001\x00\x00\x00')
'PRIV:WM/WMCollectionGroupID:\x8df\x01d\x013&I\x8bÕ\x0cÝ\x88s -'  PRIV(owner='WM/WMCollectionGroupID', data=b'\x8df\x01d\x013&I\x8b\xd5\x0c\xdd\x88s -')
'PRIV:WM/WMCollectionID:\x8df\x01d\x013&I\x8bÕ\x0cÝ\x88s -'  PRIV(owner='WM/WMCollectionID', data=b'\x8df\x01d\x013&I\x8b\xd5\x0c\xdd\x88s -')
'PRIV:WM/WMContentID:èÜ\x8eÙ6ÍÄF©<\x95Òi\x19¿H'     PRIV(owner='WM/WMContentID', data=b'\xe8\xdc\x8e\xd96\xcd\xc4F\xa9<\x95\xd2i\x19\xbfH')
'TALB' (Album/Movie/Show title)                     '1936-1940'
'TBPM' (BPM (beats per minute))                     '89.770'
'TCOM' (Composer)                                   'Lil Armstrong'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-vocal'
'TDRC' (Recording time)                             '1935'
'TIT2' (Title/songname/content description)         "Let's Get Happy Together"
'TKEY' (Initial key)                                '10A'
'TLEN' (Length)                                     '176692'
'TPE1' (Lead performer(s)/Soloist(s))               'Lil Armstrong'
'TPE2' (Band/orchestra/accompaniment)               'Lil Armstrong '
'TPUB' (Publisher)                                  'Classics'
'TRCK' (Track number/Position in set)               '15'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['jazz', 'oldies', 'vocal jazz', 'acoustic', 'swing']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+2.63 dB'
'TXXX:replaygain_track_peak'                        '0.423615'

========================== row from database ==========================
                                              'id'  1528386
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/30_s collection/lil armstrong - let_s get happy together 1936-1940.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  176
                                           'genre'  prerock-jb-jazz-vocal
                                        'filesize'  2857446
                                           'mtime'  1620527907
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 30_s collection lil armstrong let_s happy together prerock jb jazz vocal
                                      'tag_artist'  Lil Armstrong 
                                     'tag_release'  1936-1940
                                       'tag_title'  Let's Get Happy Together
                                             'bpm'  89.77
                                    'search_title'  'get':4 'happy':5 'let':1 'lets':3 's':2 'together':6
                                   'search_artist'  'armstrong':2 'lil':1
                                  'search_release'  '1936':1 '19361940':3 '1940':2
                                     'search_rest'  '30':5 'armstrong':9 'collection':7 'country':4 'exotica':2 'happy':12 'jazz':1 'jb':15 'let':10 'lil':8 'oldies':3 'prerock':14 's':6,11 'together':13 'vocal':16
                                    'search_combo'  '1936':9C '19361940':11C '1940':10C '30':16 'armstrong':8B,20 'collection':18 'country':15 'exotica':13 'get':4A 'happy':5A,23 'jazz':12 'jb':26 'let':1A,21 'lets':3A 'lil':7B,19 'oldies':14 'prerock':25 's':2A,17,22 'together':6A,24 'vocal':27
                                    'tag_tracknum'  15
                                      'num_images'  1
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-2', 'q-mixbeat-1', 'Q-PIANO-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-2', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'Q-PLAY-2', 'q-bass-2', 'q-grit-1']
                                      'lastfmtags'  ['jazz', 'oldies', 'vocal jazz', 'acoustic', 'swing']
                                        'tag_date'  1935
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620527906.8696733  (2021-05-09 04:38:26)
                             'size'  2857446