======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '164'
                                          'artist'  'Bessie  Smith'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Nobody knows you'
                                           'quals'  ("['Q-GRIT-2', 'Q-BUSY-2', 'Q-PLAY-3', 'q-bass-1', 'Q-CHART-2', 'q-drums-1', "
 "'q-other-3', 'q-piano-1', 'q-vocals-4', 'Q-SYN-1', 'Q-UNU-1', 'Q-JZFKS-3', "
 "'Q-OLDST-1', 'Q-HHRNBTT-1', 'Q-MIXBEAT-1', 'Q-LOCALNESS-2']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '0'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'prerock-jb-blues'
                                             'bpm'  '145.5'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '145.5'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-blues'
'TIT2' (Title/songname/content description)         'Nobody knows you'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Bessie  Smith'
'TRCK' (Track number/Position in set)               '0'
'TXXX:MusicMagic Data'                              'AgEBYgVRgcWfD6IbgqLjKTbZgAGBF4Mr//Wvu/0dgAG9h4ABgAEU0skggAHLB4ABgwyAAaF3prPFFYABgAHFOQv2ywSAAZKMgAKAAYaJoamYUoHMCek7i4nIgiyKSQCerL4FjoB/w0CGX5Y/FEnDOIAF2uqGr4X+kg6/uN3n1sKBXoCex4gNzvV9wNeltIDCgQk='
'TXXX:MusicMagic Fingerprint'                       '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'
'TXXX:Q-BUSY'                                       '2'
'TXXX:Q-CHART'                                      '2'
'TXXX:Q-GRIT'                                       '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-MIXBEAT'                                    '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PLAY'                                       '3'
'TXXX:Q-SYN'                                        '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:http://www.foosic.org/'                       '000050400000c5077a14b4040001ec110005e04008054ed28003d92b3ffa0d14ff3bbedbff77e0cfb3bbf314edf3d3eff377e32cbffbd3aaf33ac3a7cecb2aef7f4e043ffff97ef3f2f3bbffe97fcb13891bfd6f3ff993af03ecdf17ffefc83b4cf7f2ffbffed3f03fcc60cdffe80f7ffffcf8cffffdbcffec379a6f7b6300fffc3323f7fff3833fffef0efffffbbf3edff38dffffdf327cdfc7368f87f3d616df79ff1bffdffbbefff3825ffcb7d2cbbfffc4cbeff04cf3ffc088ffdf67bc6ffff053ffff0383fbffeb13fffcf3c3f9fffccf5b13efeff7f7f7243ff7dfbdfff317c848fe3be0021da3af6f7fff8bef3fbed803fef3834fe303ff3b7f7cd4f2ffdc62cfff811fefffcc9dd65cf7f37ffffb83fffbf625e9fdf3532ff3f5c3ef2fedc133fbf70c3bfff09ab5fceb0b32cc8bc0633ff3e05fbffff333bf059c8ddbf9693efedbe730ffab4ff3cf3d071f3ffee3fcf3f3f39fffc351ffffdf0833fef983af9f21186185e36d78e30df5e37df2daee3ee37d36df8df0d77c36e77f33ebee38dfedf9e37c30e30bfcf7cc77e7edf7df7eb7e30df0dfde36c78e39df8dfceb9db0c37e00'
'TXXX:q-bass'                                       '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '-0.38 dB'
'TXXX:replaygain_track_peak'                        '0.437225'

========================== row from database ==========================
                                              'id'  1495171
                                            'path'  /data/Music/Other/Pa/Blues/Bessie  Smith/Nobody knows you.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  164
                                           'genre'  prerock-jb-blues
                                        'filesize'  3301508
                                           'mtime'  1621094224
                                   'redo_metaread'  0
                                        'rest_str'   Pa Blues prerock jb blues
                                      'tag_artist'  Bessie  Smith
                                     'tag_release'  None
                                       'tag_title'  Nobody knows you
                                             'bpm'  145.5
                                    'search_title'  'knows':2 'nobody':1 'you':3
                                   'search_artist'  'bessie':1 'smith':2
                                  'search_release'  
                                     'search_rest'  'blues':2 'jb':4 'pa':1 'prerock':3
                                    'search_combo'  'bessie':4B 'blues':7 'jb':9 'knows':2A 'nobody':1A 'pa':6 'prerock':8 'smith':5B 'you':3A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'Q-MIXBEAT-1', 'Q-OLDST-1', 'Q-GRIT-2', 'Q-CHART-2', 'Q-JZFKS-3', 'Q-UNU-1', 'q-drums-1', 'Q-SYN-1', 'q-other-3', 'Q-BUSY-2', 'Q-PLAY-3', 'q-bass-1']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621094223.501777  (2021-05-15 17:57:03)
                             'size'  3301508