When I first did my early graph music, things had to come in a certain time span. Now it didn’t have to come exactly in the beginning of the time span, and as you know it can come anywhere, like crossing a street, that’s why I called them Intersection, to me time was the distance, metaphorically, between a green light and a red light. It was like traffic, it was a control. So I always controlled the time, but I didn’t control the notes. When I started to do my free durational music I controlled the notes but I didn’t control the time. So both these ideas meant I had to leave something out.