In this film, Karen Stephenson introduces her instrument - the cello. To learn more about the cello visit http://www.philharmonia.co.uk/explore/instruments/cello 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 reall