He remained with the company until 1983, performing 69 different roles of the Spieltenor repertory,[4] such as Jaquino in Beethoven's Fidelio and Scaramuccio in Ariadne auf Naxos by Richard Strauss.

[1][2] He took part in around 2000 performances,[5] also as Monostatos in Mozart's The Magic Flute, Trabuco in Verdi's La forza del destino, Goro in Puccini's Madama Butterfly, Spoletta in Tosca, and Remendado in Bizet's Carmen,[4][6] working with conductors such as Karl Böhm, Herbert von Karajan and Georg Solti.

[3] He regularly appeared at the Salzburg Festival operas and concerts, including the world premieres of Rolf Liebermann's Penelope (1954), Frank Martin's Mystère de la Nativité (1960), and Rudolf Wagner-Régeny's Das Bergwerk zu Falun (1961).

[10] In 1977, he sang the Evangelist in a recording of the St Matthew Passion with the Netherlands Bach Society, conducted by Charles de Wolff, with Max van Egmond as the vox Christi.

With Harnoncourt he recorded works by Monteverdi, such as his operas L'Orfeo, Il ritorno d'Ulisse in patria, L'incoronazione di Poppea[12] and the Vespro della Beata Vergine.