======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '277'
                                          'artist'  'Toshiyuki Honda'
                                     'text_people'  ''
                                         'release'  'Metropolis OST'
                                           'title'  "There'll Never Be Good-Bye ---The Theme of Metropolis---"
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-3', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['soundtrack', 'jazz', 'japanese', 'composer', 'anime']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '20'
                                      'tracktotal'  ''
                                            'date'  '2002'
                                        'comments'  ''
                                           'genre'  'soundtrack-video'
                                             'bpm'  '138.702'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            ' 00000C77 00000B1D 00004ACE'
'COMM:iTunNORM:eng'                                 (' 00000C77 00000B1D 00004ACE 00004C49 0001D4D7 0001D4EE 00006402 000066B7 '
 '0003F7E5 0003F7E5')
'PRIV:AverageLevel:N\x15\x00\x00'                   PRIV(owner='AverageLevel', data=b'N\x15\x00\x00')
'PRIV:PeakValue:\x91w\x00\x00'                      PRIV(owner='PeakValue', data=b'\x91w\x00\x00')
'TALB' (Album/Movie/Show title)                     'Metropolis OST'
'TBPM' (BPM (beats per minute))                     '138.702'
'TCON' (Content type, a.k.a. Genre)                 'soundtrack-video'
'TDRC' (Recording time)                             '2002'
'TIT2' (Title/songname/content description)         "There'll Never Be Good-Bye ---The Theme of Metropolis---"
'TKEY' (Initial key)                                '10B'
'TPE1' (Lead performer(s)/Soloist(s))               'Toshiyuki Honda'
'TRCK' (Track number/Position in set)               '20'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['soundtrack', 'jazz', 'japanese', 'composer', 'anime']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.65 dB'
'TXXX:replaygain_track_peak'                        '0.392756'

========================== row from database ==========================
                                              'id'  1496924
                                            'path'  /data/Music/Bulk/0soundtrack/Metropolis (anime ost)/20 - There_ll Never Be Good-Bye ---The Theme of Metropolis--.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  277
                                           'genre'  soundtrack-video
                                        'filesize'  11094725
                                           'mtime'  1621489611
                                   'redo_metaread'  0
                                        'rest_str'   0soundtrack (anime ost) 20 There_ll soundtrack video
                                      'tag_artist'  Toshiyuki Honda
                                     'tag_release'  Metropolis OST
                                       'tag_title'  There'll Never Be Good-Bye ---The Theme of Metropolis---
                                             'bpm'  138.702
                                    'search_title'  'be':5 'bye':7 'good':6 'goodbye':8 'll':2 'metropolis':13,14 'never':4 'of':12 'the':9,10 'theme':11 'there':1 'therell':3
                                   'search_artist'  'honda':2 'toshiyuki':1
                                  'search_release'  'metropolis':1 'ost':2
                                     'search_rest'  '0soundtrack':1 '20':6 'anime':2,3 'll':8 'ost':4,5 'soundtrack':9 'there':7 'video':10
                                    'search_combo'  '0soundtrack':19 '20':24 'anime':20,21 'be':5A 'bye':7A 'good':6A 'goodbye':8A 'honda':16B 'll':2A,26 'metropolis':13A,14A,17C 'never':4A 'of':12A 'ost':18C,22,23 'soundtrack':27 'the':9A,10A 'theme':11A 'there':1A,25 'therell':3A 'toshiyuki':15B 'video':28
                                    'tag_tracknum'  20
                                      'num_images'  0
                                             'key'  10B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['soundtrack', 'jazz', 'japanese', 'composer', 'anime']
                                        'tag_date'  2002
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621489611.2071497  (2021-05-20 07:46:51)
                             'size'  11094725