I had invented my own system, my own way of making electronic music at the San Francisco Tape Music Centre, and I was using what is now referred to as a classical electronic music studio, consisting of tube oscillators and patch bays. There were no mixers or synthesizers. So I managed to figure out how to make the oscillators sing. I used a tape delay system using two tape recorders and stringing the tape between the two tape machines and being able to configure the tracks coming back in different ways.

I think the worst thing is stereotyping.

When I am composing, the sounds are leading me to the way I want them to organize.

That's software in the States that I helped to develop. It enables people with disabilities to improvise.

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.

I try to influence this improvisation in two ways. One is by centering on reflections, in both senses of the word: acoustic reflections as well as visual reflections from a mirror or surface, and then reflecting on the material in a contemplative way. The other influence is listening to the tails of the sounds that you make.

[Students] they did the sonic meditations, I would observe them in their ensembles, and the ensembles improved incredibly. So I knew I had something to do and something to say.