 She recorded the latter role in 1980, opposite Karin Ott and Janet Perry, under Herbert von Karajan.Other roles she sang include Sophie and the Marschallin in "Der Rosenkavalier" by Richard Strauss and Agathe and Ännchen in Weber's "Der Freischütz".Mathis also sang in the premieres of Gottfried von Einem's "Der Zerrissene", Henze's "Der junge Lord", Heinrich Sutermeister's "Le roi Berénger", and Menotti's "Help, Help, the Globolinks!"