Ten years ago I started writing material for the pupils in my school’s Amnesty International Youth Group to perform. The subject was domestic violence and I thought of using their voices in a way that would allow the sounds of the words to complement the actions in the poem. So when there was something bad happening, the joining of words and phrases would result in a cacophony. When there was resolution or peaceful thoughts, the voices would blend to produce a pleasant sound. Voices can also be used to create subtle rhythms that build up in the poem.