======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '21'
                                          'artist'  'Matsuo Ohno'
                                     'text_people'  ''
                                         'release'  'The World of Electro-Acoustic Sound and Music - 1'
                                           'title'  'New Sound of Astro Boy'
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', "
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 "'q-mixbeat-1']")
                                      'lastfmtags'  "['electroacustic', 'electronic', 'japanese', 'composer', 'sound art']"
                                     'discogstags'  "['electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  '36'
                                            'date'  '1963'
                                        'comments'  ''
                                           'genre'  'electronic-experimental-early;soundtrack-video;mi-earlysynth'
                                             'bpm'  '144.233'
                                             'key'  '1B'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            '0'
'COMM:iTunNORM:eng'                                 (' 00002407 00002895 00007B77 00007515 00001C0F 00001C92 000077D3 00007860 '
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'COMM:iTunPGAP:eng'                                 '0'
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 00000948 00000000000E31A8 00000000 000CC979 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'COMM:iTunes_CDDB_IDs:eng'                          '36+5BA288202C67B20B30258A72460D57EA+5134432'
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'TBPM' (BPM (beats per minute))                     '144.233'
'TCON' (Content type, a.k.a. Genre)                 ['electronic-experimental-early', 'soundtrack-video', 'mi-earlysynth']
'TDRC' (Recording time)                             '1963'
'TENC' (Encoded by)                                 'iTunes v7.6.1.9'
'TIT2' (Title/songname/content description)         'New Sound of Astro Boy'
'TKEY' (Initial key)                                '1B'
'TPE1' (Lead performer(s)/Soloist(s))               'Matsuo Ohno'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '3/36'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  'electronic'
'TXXX:lastfmtags'                                   ['electroacustic', 'electronic', 'japanese', 'composer', 'sound art']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.35 dB'
'TXXX:replaygain_track_peak'                        '0.331777'

========================== row from database ==========================
                                              'id'  764621
                                            'path'  /data/Music/Bulk/0nonmusic/The World of Electro-Acoustic Sound and Music 1/03 New Sound of Astro Boy.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  21
                                           'genre'  electronic-experimental-early;soundtrack-video;mi-earlysynth
                                        'filesize'  848636
                                           'mtime'  1636915530
                                   'redo_metaread'  0
                                        'rest_str'   0nonmusic 03 electronic experimental early;soundtrack video;mi earlysynth
                                      'tag_artist'  Matsuo Ohno
                                     'tag_release'  The World of Electro-Acoustic Sound and Music - 1
                                       'tag_title'  New Sound of Astro Boy
                                             'bpm'  144.233
                                    'search_title'  'astro':4 'boy':5 'new':1 'of':3 'sound':2
                                   'search_artist'  'matsuo':1 'ohno':2
                                  'search_release'  '1':10 'acoustic':5 'and':8 'electro':4 'electroacoustic':6 'music':9 'of':3 'sound':7 'the':1 'world':2
                                     'search_rest'  '0nonmusic':1 'early':4,6 'earlysynth':12 'electronic':2 'experimental':3 'mi':9,11 'soundtrack':5,7 'video':8,10
                                    'search_combo'  '0nonmusic':18 '1':17C 'acoustic':12C 'and':15C 'astro':4A 'boy':5A 'early':21,23 'earlysynth':29 'electro':11C 'electroacoustic':13C 'electronic':19 'experimental':20 'matsuo':6B 'mi':26,28 'music':16C 'new':1A 'of':3A,10C 'ohno':7B 'sound':2A,14C 'soundtrack':22,24 'the':8C 'video':25,27 'world':9C
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  1B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-3', 'q-chart-1', 'q-other-4', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['electroacustic', 'electronic', 'japanese', 'composer', 'sound art']
                                        'tag_date'  1963
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1636915530.0497274  (2021-11-14 19:45:30)
                             'size'  848636