Set Svanholm (Tristan) ; Kirsten Flagstad (Isolde) ; Hans Hotter (Kurwenal) ; Viorica Ursuleac (Brangäne) ; Ludwig Weber (König Marke) ; Angel Mattiello (Melot) ; supporting soloists ; Orchestra e Coro del Teatro Colón di Buenos Aires ; Erich Kleiber, conductor