======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '149'
                                          'artist'  'Aretha Franklin'
                                     'text_people'  ''
                                         'release'  'Billboard Top Pop Singles of 1967'
                                           'title'  'Respect'
                                           'quals'  ("['Q-HAP-3', 'Q-HHRNBTT-2', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-JZFKS-2', "
 "'Q-OLDST-2', 'q-syn-1', 'q-bass-4', 'q-busy-2', 'q-grit-1', 'q-play-3', "
 "'q-chart-4', 'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['rhythm and blues', 'blues', 'jazz', 'female vocalists', 'soul']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '13'
                                      'tracktotal'  ''
                                            'date'  '1967'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted;set-pl-billboard'
                                             'bpm'  '115.392'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            'Billboard'
'TALB' (Album/Movie/Show title)                     'Billboard Top Pop Singles of 1967'
'TBPM' (BPM (beats per minute))                     '115.392'
'TCON' (Content type, a.k.a. Genre)                 ['prerock-jb-jazz-unsorted', 'set-pl-billboard']
'TDRC' (Recording time)                             '1967'
'TIT2' (Title/songname/content description)         'Respect'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Aretha Franklin'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '13'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '2'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['rhythm and blues', 'blues', 'jazz', 'female vocalists', 'soul']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.50 dB'
'TXXX:replaygain_track_peak'                        '0.575180'

========================== row from database ==========================
                                              'id'  1353957
                                            'path'  /data/Music/Bulk/00poprockelectronic/Billboard/Billboard Top100/1967/013 - Arethra Franklin - Respect.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  149
                                           'genre'  prerock-jb-jazz-unsorted;set-pl-billboard
                                        'filesize'  2393565
                                           'mtime'  1620540801
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Top100 013 Arethra prerock jb jazz unsorted;set pl billboard
                                      'tag_artist'  Aretha Franklin
                                     'tag_release'  Billboard Top Pop Singles of 1967
                                       'tag_title'  Respect
                                             'bpm'  115.392
                                    'search_title'  'respect':1
                                   'search_artist'  'aretha':1 'franklin':2
                                  'search_release'  '1967':6 'billboard':1 'of':5 'pop':3 'singles':4 'top':2
                                     'search_rest'  '00poprockelectronic':1 'arethra':3 'billboard':12 'jazz':6 'jb':5 'pl':11 'prerock':4 'set':8,10 'top100':2 'unsorted':7,9
                                    'search_combo'  '00poprockelectronic':10 '1967':9C 'aretha':2B 'arethra':12 'billboard':4C,21 'franklin':3B 'jazz':15 'jb':14 'of':8C 'pl':20 'pop':6C 'prerock':13 'respect':1A 'set':17,19 'singles':7C 'top':5C 'top100':11 'unsorted':16,18
                                    'tag_tracknum'  13
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-2', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-3', 'q-syn-1', 'q-chart-4', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  ['rhythm and blues', 'blues', 'jazz', 'female vocalists', 'soul']
                                        'tag_date'  1967
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620540800.810654  (2021-05-09 08:13:20)
                             'size'  2393565