======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '280'
                                          'artist'  'Sojiro'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'O Come, All Ye Faithful'
                                           'quals'  ("['Q-JZFKS-1', 'Q-UNU-1', 'Q-OLDST-3', 'Q-LOCALNESS-1', 'q-syn-2', "
 "'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-2', 'q-drums-3', "
 "'q-other-3', 'q-piano-1', 'q-vocals-3', 'Q-HHRNBTT-1', 'q-mixbeat-2']")
                                      'lastfmtags'  "['folk', 'ambient', 'new age', 'japanese', 'ocarina']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '154'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'ifs-unsorted'
                                             'bpm'  '87.977'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '87.977'
'TCON' (Content type, a.k.a. Genre)                 'ifs-unsorted'
'TIT2' (Title/songname/content description)         'O Come, All Ye Faithful'
'TKEY' (Initial key)                                '12B'
'TPE1' (Lead performer(s)/Soloist(s))               'Sojiro'
'TRCK' (Track number/Position in set)               '154'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['folk', 'ambient', 'new age', 'japanese', 'ocarina']
'TXXX:other'                                        '가인아 놀자 (밥송 085집)'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'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'                                     '3'
'TXXX:replaygain_track_gain'                        '-7.92 dB'
'TXXX:replaygain_track_peak'                        '1.617935'

========================== row from database ==========================
                                              'id'  1351939
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/가인아 놀자 (밥송 085집) - ♬ 154 Sojiro - O Come, All Ye Faithful.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  280
                                           'genre'  ifs-unsorted
                                        'filesize'  6733323
                                           'mtime'  1620573234
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] 가인아 놀자 (밥송 085집) ♬ 154 ifs unsorted
                                      'tag_artist'  Sojiro
                                     'tag_release'  None
                                       'tag_title'  O Come, All Ye Faithful
                                             'bpm'  87.977
                                    'search_title'  'all':4 'come':2,3 'faithful':6 'o':1 'ye':5
                                   'search_artist'  'sojiro':1
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 '085집':15,16,17,18 '154':19 'files':5,6 'ifs':20 'loose':3,4 'unsorted':2 '가인아':7,8 '놀자':9,10 '밥송':11,12,13,14
                                    'search_combo'  '00poprockelectronic':8 '085집':22,23,24,25 '154':26 'all':4A 'come':2A,3A 'faithful':6A 'files':12,13 'ifs':27 'loose':10,11 'o':1A 'sojiro':7B 'unsorted':9 'ye':5A '가인아':14,15 '놀자':16,17 '밥송':18,19,20,21
                                    'tag_tracknum'  154
                                      'num_images'  0
                                             'key'  12B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['folk', 'ambient', 'new age', 'japanese', 'ocarina']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620573234.207858  (2021-05-09 17:13:54)
                             'size'  6733323