Auckland choir Viva Voce presents British composer Joby Talbot's stunning choral depiction of the great Camino de Santiago in Spain. Path of Miracles has been described as "an evocative odyssey", "a musical miracle" and even by one critic as the finest choral work of the 21st century thus far. John Rosser of Viva Voce talks about the physical demands of singing unaccompanied for almost its full 65-minute length.