http://www.globalchange.com What exactly is music? The secret of great music. Physics of sound and how it communicates. How all great music connects with passion and all great performers provoke a response from those who listen. The elusive magic of a world class musician and why live performance will become increasingly important in a virtual, online world. Comment by Dr Patrick Dixon, futurist, leading authority on global trends, conference speaker -- (bad) player of many different instruments and amateur composer.