Cecilia Vicuña, QUIPU AUSTRAL, 2012, unspun wool, string and sound, dimensions variable. Installation view of the 18th Biennale of Sydney (2012) at Cockatoo Island. Courtesy the artist. Poems and chants: Cecilia Vicuña. Additional voice: José Pérez de Arce. Sound mix: José Pérez de Arce. Recorded and mixed by José Pérez de Arce in Santiago, Chile. Photograph: Sebastian Kriete