======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '195'
                                          'artist'  '[unknown]'
                                     'text_people'  ''
                                         'release'  'Shirley & Spinoza'
                                           'title'  '28 Urumqi WindowShow7'
                                           'quals'  ("['Q-OLDST-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-3', 'q-chart-1', "
 "'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'set-pl-shirleyspinoza;set-pl-mor'
                                             'bpm'  '87.710'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Shirley & Spinoza'
'TBPM' (BPM (beats per minute))                     '87.710'
'TCON' (Content type, a.k.a. Genre)                 ['set-pl-shirleyspinoza', 'set-pl-shirleyspinoza', 'set-pl-mor']
'TIT2' (Title/songname/content description)         '28 Urumqi WindowShow7'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               '[unknown]'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TXXX:Letter'                                       '0'
'TXXX:Mp3gain_minmax'                               '114,208'
'TXXX:Mp3gain_undo'                                 '+002,+002,N'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'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'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.75 dB'
'TXXX:replaygain_track_peak'                        '0.698785'

========================== row from database ==========================
                                              'id'  871239
                                            'path'  /data/Music/Bulk/sns/urumqi/05_28_Urumqi_WindowShow7_0007.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  195
                                           'genre'  set-pl-shirleyspinoza;set-pl-mor
                                        'filesize'  3131666
                                           'mtime'  1621044111
                                   'redo_metaread'  0
                                        'rest_str'   sns urumqi 05_28_Urumqi_WindowShow7_0007 set pl shirleyspinoza;set pl mor
                                      'tag_artist'  [unknown]
                                     'tag_release'  Shirley & Spinoza
                                       'tag_title'  28 Urumqi WindowShow7
                                             'bpm'  87.71
                                    'search_title'  '28':1 'show7':5 'urumqi':2 'window':4 'windowshow7':3
                                   'search_artist'  'unknown':1,2
                                  'search_release'  'shirley':1 'spinoza':2
                                     'search_rest'  '0007':7,20 '05':3,15 '28':4,16 'mor':14 'pl':9 'set':8,11,13 'shirleyspinoza':10,12 'show7':19 'sns':1 'urumqi':2,5,17 'window':18 'windowshow7':6
                                    'search_combo'  '0007':16,29 '05':12,24 '28':1A,13,25 'mor':23 'pl':18 'set':17,20,22 'shirley':8C 'shirleyspinoza':19,21 'show7':5A,28 'sns':10 'spinoza':9C 'unknown':6B,7B 'urumqi':2A,11,14,26 'window':4A,27 'windowshow7':3A,15
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-1', 'q-other-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['mysterious', 'unknown', 'all', 'mistagged artist', 'rock']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621044111.0932882  (2021-05-15 04:01:51)
                             'size'  3131666