<pre>
======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '265'
                                          'artist'  'Akiko Noma'
                                     'text_people'  ''
                                         'release'  'キラリ'
                                           'title'  '鉄格子の空'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-OLDST-3', 'Q-JZFKS-1', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-2', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-2']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '05'
                                      'tracktotal'  ''
                                            'date'  '2003'
                                        'comments'  ''
                                           'genre'  'loc-asia-japan'
                                             'bpm'  '115.524'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================<mutagen.mp3.MPEGInfo object at 0x7f9537d819a0>

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''<br/>                                     <img style="width:150px" src="image?fid=928351"/>
'COMM:ID3v1 Comment:XXX'                            ' 00002004 00001330 00008911'
'COMM:iTunNORM:eng'                                 (' 00002004 00001330 00008911 0000339C 0003A9AE 0001FC15 00008000 00008000 '
 '0003A9C5 00015F90')
'TALB' (Album/Movie/Show title)                     'キラリ'
'TBPM' (BPM (beats per minute))                     '115.524'
'TCON' (Content type, a.k.a. Genre)                 'loc-asia-japan'
'TDRC' (Recording time)                             '2003'
'TIT2' (Title/songname/content description)         '鉄格子の空'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Akiko Noma'
'TRCK' (Track number/Position in set)               '05'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:other'                                        '2003'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-1.62 dB'
'TXXX:replaygain_track_peak'                        '0.366576'

========================== row from database ==========================
                                              'id'  928351
                                            'path'  /data/Music/Bulk/00localcharacter/00asia/浜田亜紀子/[2003] キラリ/05 鉄格子の空.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  265
                                           'genre'  loc-asia-japan
                                        'filesize'  6378490
                                           'mtime'  1622821578
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 00asia 浜田亜紀子 [2003] 05 loc asia japan
                                      'tag_artist'  Akiko Noma
                                     'tag_release'  キラリ
                                       'tag_title'  鉄格子の空
                                             'bpm'  115.524
                                    'search_title'  '鉄格子no空':2 '鉄格子の空':1
                                   'search_artist'  'akiko':1 'noma':2
                                  'search_release'  'kirari':2 'キラリ':1
                                     'search_rest'  '00asia':1 '2003':3,4 'asia':6 'japan':7 'loc':5 '浜田亜紀子':2
                                    'search_combo'  '00asia':7 '2003':9,10 'akiko':3B 'asia':12 'japan':13 'kirari':6C 'loc':11 'noma':4B 'キラリ':5C '浜田亜紀子':8 '鉄格子no空':2A '鉄格子の空':1A
                                    'tag_tracknum'  5
                                      'num_images'  1
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  2003
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1622821578.4738975  (2021-06-04 17:46:18)
                             'size'  6378490