Stolen Airs takes as its starting point an episode from Sylvie and the Songman, an opera I am writing in collaboration with the novelist Tim Binding. The Songman has developed the technique of stealing the voices and songs of birds and animals, and eventually humans. Slowly stealing Sylvie’s voice, the Songman offers to give back her song if she will tell him the secret of a group of instruments invented by her father that have produced an all-powerful single sonority. Using this scenario, the m...