 His portrayal of the villainous Alberich in "Der Ring des Nibelungen" was celebrated worldwide, and still is, through Sir Georg Solti's famous DECCA studio recording (1958–64), and Karl Böhm's 1967 recorded performance from Bayreuth, both of which have been mainstay recordings since first issued on vinyl.He sang at the Bayreuth Festival from 1952 to 1975, mainly Alberich, but also Klingsor from "Parsifal", Kurwenal from "Tristan und Isolde", Fritz Kothner from "Die Meistersinger von Nürnberg", and occasionally Hans Sachs and Friedrich von Telramund.He sang Alberich at New York's Metropolitan Opera in 1972.