======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '165'
                                          'artist'  'Vaughn Monroe'
                                     'text_people'  ''
                                         'release'  'HMV B10086'
                                           'title'  'Sound Off (Duckworth Chant)'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-2', '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-2', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['oldies', 'jazz', 'big band', '40s', 'swing', '50s']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1951'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '115.130'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'HMV B10086'
'TBPM' (BPM (beats per minute))                     '115.130'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1951'
'TIT2' (Title/songname/content description)         'Sound Off (Duckworth Chant)'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Vaughn Monroe'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['oldies', 'jazz', 'big band', '40s', 'swing', '50s']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'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'                        '+0.45 dB'
'TXXX:replaygain_track_peak'                        '0.473423'

========================== row from database ==========================
                                              'id'  1448246
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1951/Vaughn Monroe - Sound Off (Duckworth Chant) 21-4-1951.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  165
                                           'genre'  prerock-swing
                                        'filesize'  3313330
                                           'mtime'  1620562393
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1951 21 4 1951 prerock swing
                                      'tag_artist'  Vaughn Monroe
                                     'tag_release'  HMV B10086
                                       'tag_title'  Sound Off (Duckworth Chant)
                                             'bpm'  115.13
                                    'search_title'  'chant':5,6 'duckworth':3,4 'off':2 'sound':1
                                   'search_artist'  'monroe':2 'vaughn':1
                                  'search_release'  'b10086':2 'hmv':1
                                     'search_rest'  '00oldiepop':5 '1951':6 '21':7 '4':8 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':9 'swing':10
                                    'search_combo'  '00oldiepop':15 '1951':16 '21':17 '4':18 'b10086':10C 'chant':5A,6A 'country':14 'duckworth':3A,4A 'exotica':12 'hmv':9C 'jazz':11 'monroe':8B 'off':2A 'oldies':13 'prerock':19 'sound':1A 'swing':20 'vaughn':7B
                                    '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-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-2', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-2', 'q-grit-1']
                                      'lastfmtags'  ['oldies', 'jazz', 'big band', '40s', 'swing', '50s']
                                        'tag_date'  1951
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620562392.774356  (2021-05-09 14:13:12)
                             'size'  3313330