======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '190'
                                          'artist'  'Duke Ellington'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "Clarinet Lament (Barney's Concerto)"
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-2', 'q-busy-2', 'q-grit-1', 'q-play-3', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['big band', 'jazz', 'piano', 'blues', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1936'
                                        'comments'  ''
                                           'genre'  'prerock-band'
                                             'bpm'  '96.2'
                                             'key'  '6B'
                                        '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))                     '96.2'
'TCON' (Content type, a.k.a. Genre)                 'prerock-band'
'TDRC' (Recording time)                             '1936-02-27'
'TIT2' (Title/songname/content description)         "Clarinet Lament (Barney's Concerto)"
'TKEY' (Initial key)                                '6B'
'TLEN' (Length)                                     '190000'
'TPE1' (Lead performer(s)/Soloist(s))               'Duke Ellington'
'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', 'piano', 'blues', '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'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.46 dB'
'TXXX:replaygain_track_peak'                        '0.531340'

========================== row from database ==========================
                                              'id'  1517412
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1936/Duke Ellington - Clarinet Lament (Barney_s Concerto) 27-2-1936.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  190
                                           'genre'  prerock-band
                                        'filesize'  3866480
                                           'mtime'  1620560425
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1936 (Barney_s 27 2 1936 prerock band
                                      'tag_artist'  Duke Ellington
                                     'tag_release'  None
                                       'tag_title'  Clarinet Lament (Barney's Concerto)
                                             'bpm'  96.2
                                    'search_title'  'barney':3 'barneys':5 'clarinet':1 'concerto':6,7 'lament':2 's':4
                                   'search_artist'  'duke':1 'ellington':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1936':6 '2':12 '27':11 'band':14 'barney':7,9 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':13 's':8,10
                                    'search_combo'  '00oldiepop':14 '1936':15 '2':21 '27':20 'band':23 'barney':3A,16,18 'barneys':5A 'clarinet':1A 'concerto':6A,7A 'country':13 'duke':8B 'ellington':9B 'exotica':11 'jazz':10 'lament':2A 'oldies':12 'prerock':22 's':4A,17,19
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-2', 'q-grit-1']
                                      'lastfmtags'  ['big band', 'jazz', 'piano', 'blues', 'swing']
                                        'tag_date'  1936
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620560424.9022558  (2021-05-09 13:40:24)
                             'size'  3866480