======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '209'
                                          'artist'  'Billy Cotton'
                                     'text_people'  ''
                                         'release'  'Rex 10141'
                                           'title'  "If You Haven't Got Dreams (vocal - Alan Breeze)"
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['jazz', '40s', 'wartime', 'swing']"
                                     'discogstags'  "['jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1942'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '104.390'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Rex 10141'
'TBPM' (BPM (beats per minute))                     '104.390'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1942'
'TIT2' (Title/songname/content description)         "If You Haven't Got Dreams (vocal - Alan Breeze)"
'TKEY' (Initial key)                                '7A'
'TPE1' (Lead performer(s)/Soloist(s))               'Billy Cotton'
'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:discogstags'                                  'jazz'
'TXXX:lastfmtags'                                   ['jazz', '40s', 'wartime', 'swing']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+2.10 dB'
'TXXX:replaygain_track_peak'                        '0.462457'

========================== row from database ==========================
                                              'id'  1504997
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1942/Billy Cotton - If You Haven_t Got Dreams (vocal - Alan Breeze) 8-7-1942.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  209
                                           'genre'  prerock-swing
                                        'filesize'  4194098
                                           'mtime'  1620561757
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1942 Haven_t 8 7 1942 prerock swing
                                      'tag_artist'  Billy Cotton
                                     'tag_release'  Rex 10141
                                       'tag_title'  If You Haven't Got Dreams (vocal - Alan Breeze)
                                             'bpm'  104.39
                                    'search_title'  'alan':10 'breeze':11,12 'dreams':7 'got':6 'haven':3 'havent':5 'if':1 't':4 'vocal':8,9 'you':2
                                   'search_artist'  'billy':1 'cotton':2
                                  'search_release'  '10141':2 'rex':1
                                     'search_rest'  '00oldiepop':5 '1942':6 '7':10 '8':9 'country':4 'exotica':2 'haven':7 'jazz':1 'oldies':3 'prerock':11 'swing':12 't':8
                                    'search_combo'  '00oldiepop':21 '10141':16C '1942':22 '7':26 '8':25 'alan':10A 'billy':13B 'breeze':11A,12A 'cotton':14B 'country':20 'dreams':7A 'exotica':18 'got':6A 'haven':3A,23 'havent':5A 'if':1A 'jazz':17 'oldies':19 'prerock':27 'rex':15C 'swing':28 't':4A,24 'vocal':8A,9A 'you':2A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', '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-1', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['jazz', '40s', 'wartime', 'swing']
                                        'tag_date'  1942
                                     'discogstags'  ['jazz']

============================== file details ==============================
                                           'mtime'  1620561756.9234006  (2021-05-09 14:02:36)
                             'size'  4194098