======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '281'
                                          'artist'  'Yuichi Watanabe'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  '\x14\x0cP 4\x11p,\x14 C'
                                           'quals'  ("['Q-HAP-2', 'Q-OLDST-1', 'Q-JZFKS-1', 'Q-UNU-1', 'q-syn-2', 'Q-PLAY-2', "
 "'q-bass-1', 'q-busy-3', 'q-grit-2', 'Q-PIANO-4', 'q-chart-3', 'q-drums-1', "
 "'q-other-3', 'q-vocals-1', 'Q-HHRNBTT-1', 'q-mixbeat-1', 'Q-LOCALNESS-1']")
                                      'lastfmtags'  "['piano', 'instrumental', 'mellow', 'new age']"
                                     'discogstags'  "['classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '2008'
                                        'comments'  ''
                                           'genre'  ''
                                             'bpm'  '144.233'
                                             'key'  '6B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '144.233'
'TDRC' (Recording time)                             '2008'
'TIT2' (Title/songname/content description)         '\x14\x0cP 4\x11p,\x14 C'
'TKEY' (Initial key)                                '6B'
'TPE1' (Lead performer(s)/Soloist(s))               'Yuichi Watanabe'
'TPE2' (Band/orchestra/accompaniment)               'Yuichi Watanabe'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '4'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'classical'
'TXXX:lastfmtags'                                   ['piano', 'instrumental', 'mellow', 'new age']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+7.02 dB'
'TXXX:replaygain_track_peak'                        '0.255391'

========================== row from database ==========================
                                              'id'  1282053
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/Yuichi Watanabe - 바람에 살랑거리는 꽃 [].mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  281
                                           'genre'  
                                        'filesize'  6754946
                                           'mtime'  1652397986
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] 바람에 살랑거리는 꽃 []
                                      'tag_artist'  Yuichi Watanabe
                                     'tag_release'  None
                                       'tag_title'  P 4p, C
                                             'bpm'  144.233
                                    'search_title'  '4':2,4 'c':6 'p':1,3,5
                                   'search_artist'  'watanabe':2 'yuichi':1
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'files':5,6 'loose':3,4 'unsorted':2 '꽃':11,12 '바람에':7,8 '살랑거리는':9,10
                                    'search_combo'  '00poprockelectronic':9 '4':2A,4A 'c':6A 'files':13,14 'loose':11,12 'p':1A,3A,5A 'unsorted':10 'watanabe':8B 'yuichi':7B '꽃':19,20 '바람에':15,16 '살랑거리는':17,18
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6B
                                           'quals'  ['Q-HAP-2', 'Q-OLDST-1', 'Q-JZFKS-1', 'Q-UNU-1', 'q-syn-2', 'Q-PLAY-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'Q-PIANO-4', 'q-chart-3', 'q-drums-1', 'q-other-3', 'q-vocals-1', 'Q-HHRNBTT-1', 'q-mixbeat-1', 'Q-LOCALNESS-1']
                                      'lastfmtags'  ['piano', 'instrumental', 'mellow', 'new age']
                                        'tag_date'  2008
                                     'discogstags'  ['classical']

============================== file details ==============================
                                           'mtime'  1652397986.364163  (2022-05-13 01:26:26)
                             'size'  6754946