Circles was written for Berio's wife, the Americanmezzo-sopranoCathy Berberian. The work followed by two years the landmark composition Thema (Omaggio a Joyce) in which Berio deconstructed Berberian's voice through the use of innovative electronic manipulation. Throughout Circles Berio explores similar sound textures while limiting himself exclusively to acoustic means. The work was commissioned by the Fromm Foundation, with a dedication in the score to Mrs Olga Koussevitsky.