======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '194'
                                          'artist'  'Vera Lynn'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Nightingale Sang In Berkeley Square (+ Jay Wilbur Orchestra)'
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-2', 'Q-UNU-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-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['oldies', 'jazz', 'female vocalists', 'british', '40s', 'wartime']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1940'
                                        'comments'  ''
                                           'genre'  'prerock-vocal'
                                             'bpm'  '104.2'
                                             'key'  '11B'
                                        '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))                     '104.2'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1940-06-05'
'TIT2' (Title/songname/content description)         'Nightingale Sang In Berkeley Square (+ Jay Wilbur Orchestra)'
'TKEY' (Initial key)                                '11B'
'TLEN' (Length)                                     '194000'
'TPE1' (Lead performer(s)/Soloist(s))               'Vera Lynn'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['oldies', 'jazz', 'female vocalists', 'british', '40s', 'wartime']
'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'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+3.46 dB'
'TXXX:replaygain_track_peak'                        '0.554492'

========================== row from database ==========================
                                              'id'  1470479
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1940/Vera Lynn - Nightingale Sang In Berkeley Square (+ Jay Wilbur Orchestra) 5-6-1940.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  194
                                           'genre'  prerock-vocal
                                        'filesize'  3922534
                                           'mtime'  1642081148
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1940 5 6 1940 prerock vocal
                                      'tag_artist'  Vera Lynn
                                     'tag_release'  None
                                       'tag_title'  Nightingale Sang In Berkeley Square (+ Jay Wilbur Orchestra)
                                             'bpm'  104.2
                                    'search_title'  'berkeley':4 'in':3 'jay':6 'nightingale':1 'orchestra':8,9 'sang':2 'square':5 'wilbur':7
                                   'search_artist'  'lynn':2 'vera':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1940':6 '5':7 '6':8 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':9 'vocal':10
                                    'search_combo'  '00oldiepop':16 '1940':17 '5':18 '6':19 'berkeley':4A 'country':15 'exotica':13 'in':3A 'jay':6A 'jazz':12 'lynn':11B 'nightingale':1A 'oldies':14 'orchestra':8A,9A 'prerock':20 'sang':2A 'square':5A 'vera':10B 'vocal':21 'wilbur':7A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  11B
                                           'quals'  ['Q-HAP-2', 'Q-JZFKS-2', 'Q-UNU-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-2', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-1']
                                      'lastfmtags'  ['oldies', 'jazz', 'female vocalists', 'british', '40s', 'wartime']
                                        'tag_date'  1940
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1642081147.9537878  (2022-01-13 14:39:07)
                             'size'  3922534