I got very interested in attention and awareness and how to achieve certain states through understanding this.

The sound that I play is delayed, it's modified, and it's modulated. It's an intelligent system; it's happening now.

Everybody improvises their way through every day. And so I do that with music.

I have a commission to do a piece in a place in California, Oliver Ranch, which has an eight-storey structure called The Tower designed by the visual artist Ann Hamilton.

Those people who don't have any voluntary control, or hands, can work with the physical movement that they can do - whatever voluntary movement they have, even the slightest .

I had a lot of good times. I had a lot of fun. I liked what I was doing, so I just kept doing it. At the Tape Music Center, I was working from midnight to four in the morning. Because then it was quiet, nobody was there, and I could just do my work. I didn't have to fool around.

[Improvisation ] is been with me all my life. We all do it.