I needed a huge amount of energy to cope with my life. I had a huge amount of energy where stuff was concerned: it was as if all this unconscious material had been unleashed.

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 needed a huge amount of energy to cope with my life. I had a huge amount of energy where stuff was concerned: it was as if all this unconscious material had been unleashed.

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

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.

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.

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