I noticed you could monitor the recording that you're making, but you could also monitor the playback head. There's a little distance between them and so you get an echo, right? If you change the amplitude of, say, the playback and play with that, you get different qualities and different sounds. So I was very interested in that phenomenon.

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.

I think the worst thing is stereotyping.

I didn't have any sophisticated equipment at all. The equipment we had in the studio at the time was not intended to make music; it was for testing purposes. So we had to repurpose all the equipment to make music. That made me try a lot of different things.

All the way from the first thing that I can remember, like our Victrola - a wind-up record player - and my grandfather's crystal radio, and my father's shortwave radio.

I would play a long tone on my accordion, or I'd sing one, and I would note how it felt - what it did with my mental space. These were meditations that I did.

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.