I was working in, being a single parent with a grieving child of five years old. It was horrendous. I couldn't go out much, because I had my daughter to look after. So people used to come round, and Tony Harrington from The Wire came round.

I had the idea to do an anthology about instrument-making.

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.

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

Being a critic is a terrific method for killing your love of art.

David's [Cunningham] a very interesting character. He has more integrity than is good for him. So, everything he did after that sort of undermined what he'd done. Other people who kind of took life more cheaply, would have really gone for it. David almost did everything he could to scupper the whole thing, which I very much admire, but of course it was deeply irritating then, because we wanted to make a bit of money! So we made this very catchy tune and then he added a bunch of weird stuff which was all very strange.