Music that moves. We are constantly bombarded by a cacophony of sounds and yet music still has the power to influence us, often outside our awareness. What is it about this art form that draws people in? What distinguishes a performance that is technically accurate but unmusical from one that elicits the chills? In this talk, given at the Leonardo Art and Science Rendezvous at Stanford, Indre explore how music engages the brain and why it continues to be a worldwide addiction.