======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '319'
                                          'artist'  "Howlin' Wolf"
                                     'text_people'  ''
                                         'release'  "The Very Best of Howlin' Wolf: The Millenium Edition"
                                           'title'  "Rockin' the Blues"
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                                      'lastfmtags'  "['delta blues', 'blues', 'rhythm and blues', 'chicago blues', 'classic blues']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '5'
                                      'tracktotal'  '15'
                                            'date'  '1962'
                                        'comments'  ''
                                           'genre'  'prerock-jb-blues'
                                             'bpm'  '140.335'
                                             'key'  '4B'
                                        'acoustid'  '065e2ee2-8325-45d3-a0af-a2bbbb918e21'
rest: ''

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

'TALB' (Album/Movie/Show title)                     "The Very Best of Howlin' Wolf: The Millenium Edition"
'TBPM' (BPM (beats per minute))                     '140.335'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-blues'
'TDRC' (Recording time)                             '1962'
'TIT2' (Title/songname/content description)         "Rockin' the Blues"
'TKEY' (Initial key)                                '4B'
'TPE1' (Lead performer(s)/Soloist(s))               "Howlin' Wolf"
'TPE2' (Band/orchestra/accompaniment)               "Howlin' Wolf"
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '5/15'
'TSO2'                                              "Howlin' Wolf"
'TSOP' (Performer sort order)                       "Howlin' Wolf"
'TXXX:Acoustid Id'                                  '065e2ee2-8325-45d3-a0af-a2bbbb918e21'
'TXXX:Artists'                                      "Howlin' Wolf"
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'TXXX:MusicBrainz Album Id'                         'f333cd43-1ec7-4bd3-b679-f66e1921fd04'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album/compilation'
'TXXX:MusicBrainz Artist Id'                        'ca5b38c2-f39d-45a4-ad3d-daf4448846ef'
'TXXX:MusicBrainz Release Group Id'                 '316c2e14-43c4-3f44-9965-876d0020f976'
'TXXX:MusicBrainz Release Track Id'                 '10fc9feb-0490-3075-878e-60cb42c80ba6'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:lastfmtags'                                   ['delta blues', 'blues', 'rhythm and blues', 'chicago blues', 'classic blues']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.81 dB'
'TXXX:replaygain_track_peak'                        '0.805109'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'0f6cc2f9-10bd-4509-ab70-586d27044c97')

========================== row from database ==========================
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                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Howlin_ Wolf/05_HOWLIN_ WOLF_ROCKIN_ THE BLUES_THE VERY BEST OF HOWLIN_ WOLF.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  319
                                           'genre'  prerock-jb-blues
                                        'filesize'  5119540
                                           'mtime'  1620402306
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country Howlin_ 05_HOWLIN_ WOLF_ROCKIN_ THE BLUES_THE VERY BEST OF HOWLIN_ WOLF prerock jb blues
                                      'tag_artist'  Howlin' Wolf
                                     'tag_release'  The Very Best of Howlin' Wolf: The Millenium Edition
                                       'tag_title'  Rockin' the Blues
                                             'bpm'  140.335
                                    'search_title'  'blues':4 'rockin':1,2 'the':3
                                   'search_artist'  'howlin':1,2 'wolf':3
                                  'search_release'  'best':3 'edition':10 'howlin':5,6 'millenium':9 'of':4 'the':1 'very':2 'wolf':7,8
                                     'search_rest'  '05':6 'best':14 'blues':11,19 'country':4 'exotica':2 'howlin':5,7 'jazz':1 'jb':18 'of':15 'oldies':3 'prerock':17 'rockin':9 'the':10,12 'very':13 'wolf':8,16
                                    'search_combo'  '05':23 'best':10C,31 'blues':4A,28,36 'country':21 'edition':17C 'exotica':19 'howlin':5B,6B,12C,13C,22,24 'jazz':18 'jb':35 'millenium':16C 'of':11C,32 'oldies':20 'prerock':34 'rockin':1A,2A,26 'the':3A,8C,27,29 'very':9C,30 'wolf':7B,14C,15C,25,33
                                    'tag_tracknum'  5
                                      'num_images'  0
                                             'key'  4B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-2', 'q-drums-2', 'q-syn-1', 'q-chart-3', 'q-other-2', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['delta blues', 'blues', 'rhythm and blues', 'chicago blues', 'classic blues']
                                        'tag_date'  1962
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620402305.9410193  (2021-05-07 17:45:05)
                             'size'  5119540