======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '158'
                                          'artist'  'Bing Crosby'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Bob White (+ Connie Boswell)'
                                           '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-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['crooners', 'jazz', 'christmas', 'oldies', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1937'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '87.6'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:MusicMatch_Bio:eng'                           'Sound edited by Breda4@hotmail.com'
'TBPM' (BPM (beats per minute))                     '87.6'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1937-09-25'
'TIT2' (Title/songname/content description)         'Bob White (+ Connie Boswell)'
'TKEY' (Initial key)                                '8A'
'TLEN' (Length)                                     '158000'
'TPE1' (Lead performer(s)/Soloist(s))               'Bing Crosby'
'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'                                   ['crooners', 'jazz', 'christmas', 'oldies', 'swing']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '2'
'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'                        '+2.66 dB'
'TXXX:replaygain_track_peak'                        '0.614607'

========================== row from database ==========================
                                              'id'  1465711
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1937/Bing Crosby - Bob White (+ Connie Boswell) 25-9-1937.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  158
                                           'genre'  prerock-swing
                                        'filesize'  3252992
                                           'mtime'  1620561038
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1937 25 9 1937 prerock swing
                                      'tag_artist'  Bing Crosby
                                     'tag_release'  None
                                       'tag_title'  Bob White (+ Connie Boswell)
                                             'bpm'  87.6
                                    'search_title'  'bob':1 'boswell':4,5 'connie':3 'white':2
                                   'search_artist'  'bing':1 'crosby':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1937':6 '25':7 '9':8 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':9 'swing':10
                                    'search_combo'  '00oldiepop':12 '1937':13 '25':14 '9':15 'bing':6B 'bob':1A 'boswell':4A,5A 'connie':3A 'country':11 'crosby':7B 'exotica':9 'jazz':8 'oldies':10 'prerock':16 'swing':17 'white':2A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  8A
                                           '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-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-2', 'q-grit-1']
                                      'lastfmtags'  ['crooners', 'jazz', 'christmas', 'oldies', 'swing']
                                        'tag_date'  1937
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561038.2117975  (2021-05-09 13:50:38)
                             'size'  3252992