 Among those who wrote for her were Lennox Berkeley, Arnold Cooke, Roberto Gerhard, Elizabeth Maconchy, Peter Racine Fricker, Alan Rawsthorne and Mátyás Seiber.Wyss was born to a musical family in La Neuveville, Canton of Bern, Switzerland.Her two sisters, Emilie Perret-Wyss and Colette Feschotte-Wyss, were also singers, and the three sometimes performed together.