======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '152'
                                          'artist'  'Ray Noble'
                                     'text_people'  ''
                                         'release'  'HMV B-6359'
                                           'title'  'I Shall Still Keep Smiling Along (vocal - Al Bowlly)'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-2', 'q-other-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['all', 'jazz', 'orchestral jazz']"
                                     'discogstags'  "['jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1933'
                                        'comments'  ''
                                           'genre'  'prerock-band'
                                             'bpm'  '91.1'
                                             '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)                     'HMV B-6359'
'TBPM' (BPM (beats per minute))                     '91.1'
'TCON' (Content type, a.k.a. Genre)                 'prerock-band'
'TDRC' (Recording time)                             '1933-05-16'
'TIT2' (Title/songname/content description)         'I Shall Still Keep Smiling Along (vocal - Al Bowlly)'
'TKEY' (Initial key)                                '6A'
'TLEN' (Length)                                     '152000'
'TPE1' (Lead performer(s)/Soloist(s))               'Ray Noble'
'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:discogstags'                                  'jazz'
'TXXX:lastfmtags'                                   ['all', 'jazz', 'orchestral jazz']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.94 dB'
'TXXX:replaygain_track_peak'                        '0.668486'

========================== row from database ==========================
                                              'id'  1468978
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1933/Ray Noble - I Shall Still Keep Smiling Along (vocal - Al Bowlly) 16-5-1933.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  152
                                           'genre'  prerock-band
                                        'filesize'  2502486
                                           'mtime'  1620560149
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1933 16 1933 prerock band
                                      'tag_artist'  Ray Noble
                                     'tag_release'  HMV B-6359
                                       'tag_title'  I Shall Still Keep Smiling Along (vocal - Al Bowlly)
                                             'bpm'  91.1
                                    'search_title'  'al':9 'along':6 'bowlly':10,11 'i':1 'keep':4 'shall':2 'smiling':5 'still':3 'vocal':7,8
                                   'search_artist'  'noble':2 'ray':1
                                  'search_release'  '6359':3 'b':2 'b6359':4 'hmv':1
                                     'search_rest'  '00oldiepop':5 '1933':6 'band':8 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':7
                                    'search_combo'  '00oldiepop':22 '1933':23 '6359':16C 'al':9A 'along':6A 'b':15C 'b6359':17C 'band':25 'bowlly':10A,11A 'country':21 'exotica':19 'hmv':14C 'i':1A 'jazz':18 'keep':4A 'noble':13B 'oldies':20 'prerock':24 'ray':12B 'shall':2A 'smiling':5A 'still':3A 'vocal':7A,8A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', '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-2', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['all', 'jazz', 'orchestral jazz']
                                        'tag_date'  1933
                                     'discogstags'  ['jazz']

============================== file details ==============================
                                           'mtime'  1620560148.7070022  (2021-05-09 13:35:48)
                             'size'  2502486