She was engaged at opera houses in Germany and has appeared at international festivals including the Bayreuth Festival and the Glyndebourne Festival .
Elisabeth Glauser ( born 1 June 1943 ) is a Swiss operatic mezzo - soprano and an academic teacher of voice .
Elisabeth Glauser was engaged at opera houses in Germany and has appeared at international festivals including the Bayreuth Festival and the Glyndebourne Festival .
Elisabeth Glauser ( born 1 June 1943 ) is a Swiss operatic mezzo - soprano and an academic teacher of voice .