I'm very interested in vertical space.I want the players to listen to their sound in such a way that they hear the complete sound they make before they make another one. So that means that they hear the tail of the sound. Because of the reverberation, there's always more to the sound than just the sound.

Listen to everything all the time and remind yourself when you are not listening.

After a long section of the glass playing, you'll hear an instrumental sound emerge from some undisclosed location. There'll be a lot of mystery about the sound, I think.

There is a book called San Francisco Tape Music Centre:1960s Counterculture and the Avant-Garde and this book describes everything that you want to know or don't want to know about it, with a lot of documentation.

The base skill is listening: how I'm listening to the material, how I'm listening to the space. With electronic sound, it's a similar situation of how to produce it and place it so that it works in a space. The first consideration is adopting the space and having work that resonates in the space.

Something that I did, and I developed out of that sonic meditations, which were pieces that I composed in the '70s that now are very well-known and used in many classrooms all over the world, but at the time were outrageous.

Deep listening is experiencing heightened awareness or expanded awareness of sound and of silence, of quiet, and of sounding - making sounds.