======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '159'
                                          'artist'  '張露/ 曉露'
                                     'text_people'  'Stephen C. Foster (1826-1864)'
                                         'release'  'Ying Chun Hua (Pathe 100: The Series Vol.1)'
                                           'title'  'Oh! Susanna (A Banjo on my Knee)'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'Q-LOCALNESS-3', 'q-syn-1', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['chinese']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '13'
                                      'tracktotal'  '23'
                                            'date'  '2004'
                                        'comments'  ''
                                           'genre'  'loc-asia-china'
                                             'bpm'  '84.703'
                                             'key'  '8B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:XXX'                            '23+F6F64579BFE322F5E9BB26F9F'
'COMM:iTunNORM:eng'                                 (' 0000028E 0000028F 00002571 00002555 0000649C 0000649C 000058F7 0000590B '
 '000180E5 000180E5')
'COMM:iTunPGAP:eng'                                 '0'
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 00000A80 00000000006AFBF0 00000000 004D9054 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'COMM:iTunes_CDDB_IDs:eng'                          '23+F6F64579BFE322F5E9BB26F9F9A0B969+10529491'
'TALB' (Album/Movie/Show title)                     'Ying Chun Hua (Pathe 100: The Series Vol.1)'
'TBPM' (BPM (beats per minute))                     '84.703'
'TCOM' (Composer)                                   'Stephen C. Foster (1826-1864)'
'TCON' (Content type, a.k.a. Genre)                 'loc-asia-china'
'TDRC' (Recording time)                             '2004'
'TENC' (Encoded by)                                 'iTunes 8.2'
'TIT2' (Title/songname/content description)         'Oh! Susanna (A Banjo on my Knee)'
'TKEY' (Initial key)                                '8B'
'TPE1' (Lead performer(s)/Soloist(s))               'Chang Loo & Xiao Loo'
'TPE2' (Band/orchestra/accompaniment)               '張露/ 曉露'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '13/23'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   'chinese'
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+2.18 dB'
'TXXX:replaygain_track_peak'                        '0.582301'

========================== row from database ==========================
                                              'id'  932287
                                            'path'  /data/Music/Bulk/00localcharacter/00asia/chang loo - xiao loo - pathe 100 the series/13. oh! susanna (a banjo on my knee) - chang loo & xiao loo.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  159
                                           'genre'  loc-asia-china
                                        'filesize'  5452853
                                           'mtime'  1621629203
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 00asia chang loo xiao loo pathe series 13. oh! susanna (a banjo knee) chang loo & xiao loo loc asia china
                                      'tag_artist'  張露/ 曉露
                                     'tag_release'  Ying Chun Hua (Pathe 100: The Series Vol.1)
                                       'tag_title'  Oh! Susanna (A Banjo on my Knee)
                                             'bpm'  84.703
                                    'search_title'  'a':3,4 'banjo':5 'knee':8,9 'my':7 'oh':1 'on':6 'susanna':2
                                   'search_artist'  '張露':1,2 '曉露':3
                                  'search_release'  '1':11 '100':6,7 'chun':2 'hua':3 'pathe':4,5 'series':9 'the':8 'vol':10 'vol1':12 'ying':1
                                     'search_rest'  '00asia':1 '13':7,8 'a':11,12 'asia':17 'banjo':13 'chang':2 'china':18 'knee':14,15 'loc':16 'loo':3 'oh':9 'pathe':5 'series':6 'susanna':10 'xiao':4
                                    'search_combo'  '00asia':25 '1':23C '100':18C,19C '13':31,32 'a':3A,4A,35,36 'asia':41 'banjo':5A,37 'chang':26 'china':42 'chun':14C 'hua':15C 'knee':8A,9A,38,39 'loc':40 'loo':27 'my':7A 'oh':1A,33 'on':6A 'pathe':16C,17C,29 'series':21C,30 'susanna':2A,34 'the':20C 'vol':22C 'vol1':24C 'xiao':28 'ying':13C '張露':10B,11B '曉露':12B
                                    'tag_tracknum'  13
                                      'num_images'  1
                                             'key'  8B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['chinese']
                                        'tag_date'  2004
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621629202.6021056  (2021-05-21 22:33:22)
                             'size'  5452853