In this film, Nicholas Bootiman introduces his instrument - the viola. To learn more about the viola visit http://www.philharmonia.co.uk/explore/instruments/viola. Why not download our iPad app The Orchestra to learn even more? Visit www.philharmonia.co.uk/app for more information. "Have you seen the app called 'The Orchestra'? It is astonishing. For somebody who can't read music to learn how an orchestra functions, to be able to see from the perspective of a flute or a second violin, is r