That change happened about 1991. It was not possible to transfer the Expanded Instrument System to the computer until then, when 16-bit recording became available.

We think about sitting in a space and hearing some music by having our ears pointed forward towards the musicians sitting opposite us. I'm really not following that paradigm at all.

Listening is selecting and interpreting and acting and making decisions.

It's going to take about a year or two for the transfer to be completed. We have a certification program so professionals can teach deep listening.

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.

It was around the end of the '60s, when I began to compose sonic meditations. Before that I was doing a lot of reflecting on myself, and listening to long tones.