Is dead at her home in Wales, Margaret Price, the great English soprano renowned for her interpretations of Mozart, Verdi and Wagner. The Price, who suffered of heart attack, was 69 years. The singer began her career in 1962 as a mezzo-soprano, singing the role of Cherubino in 'The Marriage of Figaro' by Mozart at the Welsh National Opera. It was the conductor and pianist James Lockhart to convince the singer to perfectionate her studies in order to bring out the beautiful upper register, thus making of her one of the most lyric sopranos' popular at the turn of the 70s and 80s. Her debut as a soprano was with Otto Klemperer, when he wanted Margaret Price to play as Fiordiligi for 'Cosi' fan tutte 'Mozart recorded for EMI by the great German director . The Price was recognized worldwide as one of the greatest interpreters of Mozart and Verdi. But her most famous interpretation of Isolde in 'Tristan und Isolde' Wagner, was directed by Carlos Kleiber and recorded under the German label Deutsche Grammophon.