The San Francisco Tape Music Centre was a kind of collective non-profit that my friends and I got started so that we could pool our equipment and make tape music.

You invent things like algorithms to take care of some of the changes you want to make. The changes aren't detectable. There's all kinds of things happening as I play.

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 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.

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.

Deep Listening is listening to everything all the time, and reminding yourself when you're not. But going below the surface too, it's an active process. It's not passive. I mean hearing is passive in that soundwaves hinge upon the eardrum. You can do both. You can focus and be receptive to your surroundings. If you're tuned out, then you're not in contact with your surroundings. You have to process what you hear. Hearing and listening are not the same thing.

One day I decided I would like to put a record into my system. So I picked up a record that was lying on the table, and put it on. I didn't bother to look at what it was because I didn't care, and it turned out to be Madame Butterfly. So I processed the aria from Madame Butterfly in my system and I played with it.