======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '171'
                                          'artist'  'Maurice Winnick'
                                     'text_people'  ''
                                         'release'  'Decca F 6599'
                                           'title'  'Once In A While (vocal - Al Bowlly)'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  '[\'big band\', \'jazz\', "1920\'s", \'swing\']'
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1938'
                                        'comments'  ''
                                           'genre'  'prerock-band'
                                             'bpm'  '143.9'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:MusicMatch_Bio:eng'                           'Sound edited by Breda4@hotmail.com'
'TALB' (Album/Movie/Show title)                     'Decca F 6599'
'TBPM' (BPM (beats per minute))                     '143.9'
'TCON' (Content type, a.k.a. Genre)                 'prerock-band'
'TDRC' (Recording time)                             '1938-01-20'
'TIT2' (Title/songname/content description)         'Once In A While (vocal - Al Bowlly)'
'TKEY' (Initial key)                                '6A'
'TLEN' (Length)                                     '171000'
'TPE1' (Lead performer(s)/Soloist(s))               'Maurice Winnick'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['big band', 'jazz', "1920's", 'swing']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'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'                        '+1.79 dB'
'TXXX:replaygain_track_peak'                        '0.576696'

========================== row from database ==========================
                                              'id'  1466679
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1938/Maurice Winnick - Once In A While (vocal - Al Bowlly) 20-1-1938.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  171
                                           'genre'  prerock-band
                                        'filesize'  3470923
                                           'mtime'  1620560671
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1938 20 1 1938 prerock band
                                      'tag_artist'  Maurice Winnick
                                     'tag_release'  Decca F 6599
                                       'tag_title'  Once In A While (vocal - Al Bowlly)
                                             'bpm'  143.9
                                    'search_title'  'a':3 'al':7 'bowlly':8,9 'in':2 'once':1 'vocal':5,6 'while':4
                                   'search_artist'  'maurice':1 'winnick':2
                                  'search_release'  '6599':3 'decca':1 'f':2
                                     'search_rest'  '00oldiepop':5 '1':8 '1938':6 '20':7 'band':10 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':9
                                    'search_combo'  '00oldiepop':19 '1':22 '1938':20 '20':21 '6599':14C 'a':3A 'al':7A 'band':24 'bowlly':8A,9A 'country':18 'decca':12C 'exotica':16 'f':13C 'in':2A 'jazz':15 'maurice':10B 'oldies':17 'once':1A 'prerock':23 'vocal':5A,6A 'while':4A 'winnick':11B
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             '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-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['big band', 'jazz', "1920's", 'swing']
                                        'tag_date'  1938
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620560671.125447  (2021-05-09 13:44:31)
                             'size'  3470923