Hans Knappertsbusch ( born Elberfeld ( Wuppertal ) , 12 March 1888 ; died Munich , 25 October 1965 ) was a German conductor . Hans Knappertsbusch ( 12 March 1888 -- 25 October 1965 ) was a German conductor , best known for his performances of the music of Richard Wagner , Anton Bruckner and Richard Strauss .