======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '117'
                                          'artist'  'G Clefs'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Ka Ding Dong'
                                           'quals'  ("['Q-JZFKS-2', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'q-syn-1', 'q-bass-2', 'q-busy-2', 'q-grit-1', 'q-play-2', 'q-chart-1', "
 "'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-1']")
                                      'lastfmtags'  "['rock and roll', 'oldies', 'doo wop', '60s', 'rnb']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1956'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '131.243'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '131.243'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1956'
'TIT2' (Title/songname/content description)         'Ka Ding Dong'
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'G Clefs'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['rock and roll', 'oldies', 'doo wop', '60s', 'rnb']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '-0.49 dB'
'TXXX:replaygain_track_peak'                        '0.559169'

========================== row from database ==========================
                                              'id'  1446362
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1956/G Clefs - Ka Ding Dong 28-7-1956.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  117
                                           'genre'  prerock-unsorted
                                        'filesize'  2357042
                                           'mtime'  1620387672
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1956 28 7 1956 prerock unsorted
                                      'tag_artist'  G Clefs
                                     'tag_release'  None
                                       'tag_title'  Ka Ding Dong
                                             'bpm'  131.243
                                    'search_title'  'ding':2 'dong':3 'ka':1
                                   'search_artist'  'clefs':2 'g':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1956':6 '28':7 '7':8 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':9 'unsorted':10
                                    'search_combo'  '00oldiepop':10 '1956':11 '28':12 '7':13 'clefs':5B 'country':9 'ding':2A 'dong':3A 'exotica':7 'g':4B 'jazz':6 'ka':1A 'oldies':8 'prerock':14 'unsorted':15
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-3', 'q-syn-1', 'q-chart-1', 'q-other-3', 'q-bass-2', 'q-grit-1']
                                      'lastfmtags'  ['rock and roll', 'oldies', 'doo wop', '60s', 'rnb']
                                        'tag_date'  1956
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620387671.8978496  (2021-05-07 13:41:11)
                             'size'  2357042