======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '157'
                                          'artist'  'Deanna Durbin'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "Ave Maria (Gounod) (film ' Mad About Music ')"
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-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'  ("['female vocalists in radio tv and film', '40s', 'jazz', 'female vocalists', "
 "'classical']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1939'
                                        'comments'  ''
                                           'genre'  'prerock-vocal-opera'
                                             'bpm'  '145.8'
                                             'key'  '2B'
                                        '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))                     '145.8'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal-opera'
'TDRC' (Recording time)                             '1939-04-05'
'TIT2' (Title/songname/content description)         "Ave Maria (Gounod) (film ' Mad About Music ')"
'TKEY' (Initial key)                                '2B'
'TLEN' (Length)                                     '157000'
'TPE1' (Lead performer(s)/Soloist(s))               'Deanna Durbin'
'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'                                   ['female vocalists in radio tv and film',
 '40s',
 'jazz',
 'female vocalists',
 'classical']
'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'                        '+1.85 dB'
'TXXX:replaygain_track_peak'                        '0.333898'

========================== row from database ==========================
                                              'id'  1506153
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1939/Deanna Durbin - Ave Maria (Bach - Gounod) (film _ Mad About Music _) 5-4-1939.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  157
                                           'genre'  prerock-vocal-opera
                                        'filesize'  3197515
                                           'mtime'  1621625743
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1939 (Bach _ _) 5 4 1939 prerock vocal opera
                                      'tag_artist'  Deanna Durbin
                                     'tag_release'  None
                                       'tag_title'  Ave Maria (Gounod) (film ' Mad About Music ')
                                             'bpm'  145.8
                                    'search_title'  'about':8 'ave':1 'film':5,6 'gounod':3,4 'mad':7 'maria':2 'music':9
                                   'search_artist'  'deanna':1 'durbin':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1939':6 '4':10 '5':9 'bach':7,8 'country':4 'exotica':2 'jazz':1 'oldies':3 'opera':13 'prerock':11 'vocal':12
                                    'search_combo'  '00oldiepop':16 '1939':17 '4':21 '5':20 'about':8A 'ave':1A 'bach':18,19 'country':15 'deanna':10B 'durbin':11B 'exotica':13 'film':5A,6A 'gounod':3A,4A 'jazz':12 'mad':7A 'maria':2A 'music':9A 'oldies':14 'opera':24 'prerock':22 'vocal':23
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  2B
                                           '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-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['female vocalists in radio tv and film', '40s', 'jazz', 'female vocalists', 'classical']
                                        'tag_date'  1939
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621625742.5545309  (2021-05-21 21:35:42)
                             'size'  3197515