======================== unified (from filesystem) ========================
                                         'bitrate'  '252.254'
                                        'duration'  '146'
                                          'artist'  'The Clear Wind Band'
                                     'text_people'  ''
                                         'release'  'Shanghai Jazz 2'
                                           'title'  'Nao Ren De Ye Yu - Rain Song'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-3', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'Q-LOCALNESS-3', 'q-syn-1', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'Q-PIANO-3', 'q-chart-1', 'q-drums-1', 'q-other-2', 'q-vocals-3', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '5'
                                      'tracktotal'  '14'
                                            'date'  '2007'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-soft-swing;loc-asia-china;set-pl-shirleyspinoza;set-pl-mor'
                                             'bpm'  '141.9'
                                             'key'  '8B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM::eng'                                         '8B'
'TALB' (Album/Movie/Show title)                     'Shanghai Jazz 2'
'TBPM' (BPM (beats per minute))                     '141.9'
'TCON' (Content type, a.k.a. Genre)                 ['prerock-jb-jazz-soft-swing',
 'loc-asia-china',
 'set-pl-shirleyspinoza',
 'set-pl-mor']
'TDRC' (Recording time)                             '2007'
'TIT2' (Title/songname/content description)         'Nao Ren De Ye Yu - Rain Song'
'TKEY' (Initial key)                                '8B'
'TPE1' (Lead performer(s)/Soloist(s))               'The Clear Wind Band'
'TRCK' (Track number/Position in set)               '5/14'
'TSSE' (Software/Hardware and settings used for encoding)  ('Audiograbber 1.83.01, LAME dll 3.98, VBR 0 (Default method), Joint Stereo, '
 'High quality')
'TXXX:EnergyLevel'                                  '2'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.15 dB'
'TXXX:replaygain_track_peak'                        '0.401366'

========================== row from database ==========================
                                              'id'  746017
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Shanghai Jazz 2/05 Nao Ren De Ye Yu - Rain Song.mp3
                                         'working'  None
                                         'bitrate'  252
                                    'duration_sec'  146
                                           'genre'  prerock-jb-jazz-soft-swing;loc-asia-china;set-pl-shirleyspinoza;set-pl-mor
                                        'filesize'  4744008
                                           'mtime'  1620534910
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 05 prerock jb jazz soft swing;loc asia china;set pl shirleyspinoza;set pl mor
                                      'tag_artist'  The Clear Wind Band
                                     'tag_release'  Shanghai Jazz 2
                                       'tag_title'  Nao Ren De Ye Yu - Rain Song
                                             'bpm'  141.9
                                    'search_title'  'de':3 'nao':1 'rain':6 'ren':2 'song':7 'ye':4 'yu':5
                                   'search_artist'  'band':4 'clear':2 'the':1 'wind':3
                                  'search_release'  '2':3 'jazz':2 'shanghai':1
                                     'search_rest'  'asia':12 'china':13,15 'country':4 'exotica':2 'jazz':1 'jb':6 'loc':9,11 'mor':22 'oldies':3 'pl':17 'prerock':5 'set':14,16,19,21 'shirleyspinoza':18,20 'soft':7 'swing':8,10
                                    'search_combo'  '2':14C 'asia':26 'band':11B 'china':27,29 'clear':9B 'country':18 'de':3A 'exotica':16 'jazz':13C,15 'jb':20 'loc':23,25 'mor':36 'nao':1A 'oldies':17 'pl':31 'prerock':19 'rain':6A 'ren':2A 'set':28,30,33,35 'shanghai':12C 'shirleyspinoza':32,34 'soft':21 'song':7A 'swing':22,24 'the':8B 'wind':10B 'ye':4A 'yu':5A
                                    'tag_tracknum'  5
                                      'num_images'  1
                                             'key'  8B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-3', 'q-mixbeat-1', 'Q-PIANO-3', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  2007
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620534909.9865897  (2021-05-09 06:35:09)
                             'size'  4744008