Dan Jones, composer and sound designer, considers why it has taken so long for Sound Art to get a hearing, he goes hunting for sound at CERN with Bill Fontana, Janet Cardiff talks about her 40 part Motet, Barbara London, MOMA curator, tells of the difficulties of displaying sound, Stan Shaff shows us round the first sound theatre, and David Toop and Richard Cork help untangle the history of sound art - plus an unexpected appearance on the streets of London by Joseph Young expounding the Art of Noises Manifesto of the Italian Futurists.