DENNIS: That experience is very important to help you understand how I see. Um, there's a sound of water, there's a sound of a beach, there's a sound of a door, there's a sound of a clock ticking, all these sounds. This is my world. I live in a world of sound. When I walk down Fifth Avenue , I hear the steps of people, I hear the voices of people, I hear bags rattling, I hear cars passing, buses. And all these sounds, the way I register them in my mind may not be what you see. But I have a canvas in my mind that registers all those sounds and makes a picture. And that's what that tape that they played for me does. It puts all the sounds together and makes a picture.