======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '139'
                                          'artist'  'Zhou Xuan'
                                     'text_people'  ''
                                         'release'  'The Legendary Chinese Hits Vol. 5'
                                           'title'  'Picking Betel Nuts'
                                           'quals'  ("['Q-HAP-3', 'Q-OLDST-3', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-3', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['shidaiqu', 'chinese', 'chinese oldies', 'female vocalists', 'vocal']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  ''
                                            'date'  '1992'
                                        'comments'  ''
                                           'genre'  'loc-asia-china;set-pl-shirleyspinoza;set-pl-mor'
                                             'bpm'  '92.013'
                                             'key'  '2A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:XXX'                            ' 000008CC 0000087F 00004083'
'COMM:iTunNORM:eng'                                 (' 000008CC 0000087F 00004083 00003E9C 000057A7 000057A7 000084D7 00008497 '
 '00001D63 00001D63')
'COMM:iTunPGAP:eng'                                 '1'
'COMM:iTunes_CDDB_IDs:eng'                          '15+FDBBDACF11D87072B1D84FCB8CD1C892+3713920'
'TALB' (Album/Movie/Show title)                     'The Legendary Chinese Hits Vol. 5'
'TBPM' (BPM (beats per minute))                     '92.013'
'TCON' (Content type, a.k.a. Genre)                 ['loc-asia-china', 'set-pl-shirleyspinoza', 'set-pl-mor']
'TDRC' (Recording time)                             '1992'
'TENC' (Encoded by)                                 'iTunes v4.6'
'TIT2' (Title/songname/content description)         'Picking Betel Nuts'
'TKEY' (Initial key)                                '2A'
'TPE1' (Lead performer(s)/Soloist(s))               'Zhou Xuan'
'TPOS' (Part of a set)                              '5/5'
'TRCK' (Track number/Position in set)               '4'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['shidaiqu', 'chinese', 'chinese oldies', 'female vocalists', 'vocal']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'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'                        '+0.95 dB'
'TXXX:replaygain_track_peak'                        '0.435425'

========================== row from database ==========================
                                              'id'  928736
                                            'path'  /data/Music/Bulk/00localcharacter/00asia/The Legendary Chinese Hits/5-04 Picking Betel Nuts.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  139
                                           'genre'  loc-asia-china;set-pl-shirleyspinoza;set-pl-mor
                                        'filesize'  3942226
                                           'mtime'  1621629181
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 00asia 04 loc asia china;set pl shirleyspinoza;set pl mor
                                      'tag_artist'  Zhou Xuan
                                     'tag_release'  The Legendary Chinese Hits Vol. 5
                                       'tag_title'  Picking Betel Nuts
                                             'bpm'  92.013
                                    'search_title'  'betel':2 'nuts':3 'picking':1
                                   'search_artist'  'xuan':2 'zhou':1
                                  'search_release'  '5':7 'chinese':3 'hits':4 'legendary':2 'the':1 'vol':5,6
                                     'search_rest'  '00asia':1 'asia':3 'china':4,6 'loc':2 'mor':13 'pl':8 'set':5,7,10,12 'shirleyspinoza':9,11
                                    'search_combo'  '00asia':13 '5':12C 'asia':15 'betel':2A 'china':16,18 'chinese':8C 'hits':9C 'legendary':7C 'loc':14 'mor':25 'nuts':3A 'picking':1A 'pl':20 'set':17,19,22,24 'shirleyspinoza':21,23 'the':6C 'vol':10C,11C 'xuan':5B 'zhou':4B
                                    'tag_tracknum'  4
                                      'num_images'  1
                                             'key'  2A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['shidaiqu', 'chinese', 'chinese oldies', 'female vocalists', 'vocal']
                                        'tag_date'  1992
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621629180.599544  (2021-05-21 22:33:00)
                             'size'  3942226