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

I wrote my sonic meditations and started using them with students. I took a bunch of UCSD students out to Joshua Tree and we did the sonic meditations on the boulders.

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

Maybe I'll start from the initial idea, what motivated me to do that. In 1953, I had access to a tape recorder. Tape recorders were not widely available. There was no cassette tape back then. It was a Sears Roebuck tape machine. I put a microphone in the window and recorded the ambience.

Radio broadcasting was only 25 years old when I was born in 1932.

I used to go into the studio around midnight and stay all night.

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.