Hans Werner Henze's career is notable for his mastery of a broad range of idioms, from the post-Romantic lyricism of Cantata della fiaba estrema to the neo-classical delicacy of his chamber music to the brash modernism of Der langwierige Weg in die Wohnung der Natasha Ungeheuer. Voices, written in 1973, can be heard as a compendium of many of the types of music he had embraced.