======================== unified (from filesystem) ========================
                                         'bitrate'  '161.965'
                                        'duration'  '168'
                                          'artist'  'Aretha Franklin'
                                     'text_people'  ''
                                         'release'  '20 Greatest Hits'
                                           'title'  'Chain of Fools'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-JZFKS-3', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-4', 'q-other-1', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['rhythm and blues', 'blues', 'jazz', 'female vocalists', 'soul']"
                                     'discogstags'  "['funk / soul', 'soul']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1986'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-soul'
                                             'bpm'  '116.520'
                                             'key'  '5A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     '20 Greatest Hits'
'TBPM' (BPM (beats per minute))                     '116.520'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-soul'
'TDRC' (Recording time)                             '1986'
'TIT2' (Title/songname/content description)         'Chain of Fools'
'TKEY' (Initial key)                                '5A'
'TPE1' (Lead performer(s)/Soloist(s))               'Aretha Franklin'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['funk / soul', 'soul']
'TXXX:lastfmtags'                                   ['rhythm and blues', 'blues', 'jazz', 'female vocalists', 'soul']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.11 dB'
'TXXX:replaygain_track_peak'                        '0.659127'

========================== row from database ==========================
                                              'id'  775648
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Aretha Franklin/20 Greatest Hits/Aretha Franklin - Chain of Fools.mp3
                                         'working'  None
                                         'bitrate'  161
                                    'duration_sec'  168
                                           'genre'  prerock-jb-jazz-soul
                                        'filesize'  3409792
                                           'mtime'  1620528165
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country prerock jb jazz soul
                                      'tag_artist'  Aretha Franklin
                                     'tag_release'  20 Greatest Hits
                                       'tag_title'  Chain of Fools
                                             'bpm'  116.52
                                    'search_title'  'chain':1 'fools':3 'of':2
                                   'search_artist'  'aretha':1 'franklin':2
                                  'search_release'  '20':1 'greatest':2 'hits':3
                                     'search_rest'  'country':4 'exotica':2 'jazz':1 'jb':6 'oldies':3 'prerock':5 'soul':7
                                    'search_combo'  '20':6C 'aretha':4B 'chain':1A 'country':12 'exotica':10 'fools':3A 'franklin':5B 'greatest':7C 'hits':8C 'jazz':9 'jb':14 'of':2A 'oldies':11 'prerock':13 'soul':15
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  5A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-4', 'q-syn-1', 'q-chart-4', 'q-other-1', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['rhythm and blues', 'blues', 'jazz', 'female vocalists', 'soul']
                                        'tag_date'  1986
                                     'discogstags'  ['funk / soul', 'soul']

============================== file details ==============================
                                           'mtime'  1620528165.3797014  (2021-05-09 04:42:45)
                             'size'  3409792