When I hear what we call music, it seems to me that someone is talking. And talking about his feelings, or about his ideas of relationships. But when I hear traffic, the sound of traffic — here on Sixth Avenue, for instance — I don't have the feeling that anyone is talking. I have the feeling that sound is acting. And I love the activity of sound... I don't need sound to talk to me.
In an interview with Miroslav Sebestik, 1991; in Listen, documentary by Miroslav Sebestik. ARTE France Développement, 2003; as quoted on Wikipedia, note 54