======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '487'
                                          'artist'  'Mariah'
                                     'text_people'  ''
                                         'release'  'You'
                                           'title'  '1L2D \t (Hana ga saitara)'
                                           'quals'  ("['Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-JZFKS-1', 'Q-OLDST-3', "
 "'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-1', "
 "'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-2', 'q-mixbeat-1']")
                                      'lastfmtags'  "['new wave', 'hard rock', 'japanese', 'art pop', 'synthpop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'set-pl-you'
                                             'bpm'  '110.603'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'APIC:Cover (front)'                                type PictureType.COVER_FRONT (Cover (front)) b'Cover (front)'
                                     
'TALB' (Album/Movie/Show title)                     'You'
'TBPM' (BPM (beats per minute))                     '110.603'
'TCON' (Content type, a.k.a. Genre)                 'set-pl-you'
'TIT2' (Title/songname/content description)         '1L2D \t (Hana ga saitara)'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Mariah'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['new wave', 'hard rock', 'japanese', 'art pop', 'synthpop']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+0.77 dB'
'TXXX:replaygain_track_peak'                        '0.635005'

========================== row from database ==========================
                                              'id'  765699
                                            'path'  /data/Music/Bulk/0playlists/0novelty themes/You/Mariah - 花が咲いたら (Hana ga saitara).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  487
                                           'genre'  set-pl-you
                                        'filesize'  7906448
                                           'mtime'  1620356181
                                   'redo_metaread'  0
                                        'rest_str'   0playlists 0novelty themes 花が咲いたら set pl you
                                      'tag_artist'  Mariah
                                     'tag_release'  You
                                       'tag_title'  1L2D 	 (Hana ga saitara)
                                             'bpm'  110.603
                                    'search_title'  '1l2d':1 'ga':4 'hana':2,3 'saitara':5,6
                                   'search_artist'  'mariah':1
                                  'search_release'  'you':1
                                     'search_rest'  '0novelty':2 '0playlists':1 'pl':7 'set':6 'themes':3 'you':8 '花ka咲itara':5 '花が咲いたら':4
                                    'search_combo'  '0novelty':10 '0playlists':9 '1l2d':1A 'ga':4A 'hana':2A,3A 'mariah':7B 'pl':15 'saitara':5A,6A 'set':14 'themes':11 'you':8C,16 '花ka咲itara':13 '花が咲いたら':12
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-1', 'q-other-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['new wave', 'hard rock', 'japanese', 'art pop', 'synthpop']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620356181.1568735  (2021-05-07 04:56:21)
                             'size'  7906448