One of the things about grief - I wouldn't generalise, because everybody responds to tragedies in different ways - but I had a huge amount of energy.

People don't have to put you in a box. You can have the confidence to move across, and combine and learn from each different practice. They inform each other.

I remember I did quite a lot of interviews when the book and the CD came out, and I did a drivetime interview for Radio London or something. You wouldn't immediately associate the music on Ocean Of Sound with drivetime radio, but people found things that they liked, and the DJ was playing some records at 5 o'clock in the afternoon on a weekday.The man who was playing them said to me, "That Peter Brotzmann track, it's like having your head boiled in acid."

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.

The Musicians Union declared you couldn't mime on Top Of The Pops, which is obviously impossible, if you've got a studio-based record that you'd worked on for a year or something. And there were a lot of terrible performances. Because on Top Of The Pops, you were just thrown onstage.

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.

If I'd thought, "I can't really play this instrument," I wouldn't have done it! But I didn't care, you know. I didn't care!