There's a sense of trajectories that are extraordinary about a life like this. You can reconnect with people and go back to playing with them after years and years of not even knowing if they're alive.

One of the nicest things is that I still get, very ambiguously, people saying to me, "Oh, I'm just reading your book." And I say, "Which one, for God's sake, I've done six now!" "Oceans of Sound".

I do still have dips of confidence or [can think] everything I do is rubbish.

Sound: always in a state of emergence or decay

We [with David Cunningham] did do Top Of The Pops. It was an eye-opener. I mean, one of the things that was so interesting - I've talked about this a few times recently, and people can't believe it - they used to do this thing called tape switch with the Musicians Union.

At that time, 73 and 74, I became aware that there were a number of us making instruments. Max Eastley was a good friend and he was making instruments, Paul Burwell and I were making instruments, Evan Parker was making instruments, and we knew Hugh Davies, who was a real pioneer of these amplified instruments.

I had ideas about music and sound and listening and time and so on that I wanted to pursue as an individual, and by doing that book, Brian [Eno] opened the door, and he decided to do a record based loosely on the book.