The guitar to me, from the classical/gut-string guitar right through to Hendrix, et cetera, has all the range [of sound]. Within those six strings it is incredible what one can get sound-wise. It's just down to imagination, really.

The way I see it, rock & roll is folk music. Street music. It isn't taught in school. It has to be picked up.

I like change and I like contrast.

It's interesting when something new comes along, a band of dwarfs playing electronic harps or something, but I'm not searching.

Many people think of me as just a riff guitarist, but I think of myself in broader terms. As a musician I think my greatest achievement has been to create unexpected melodies and harmonies within a rock and roll framework. And as a producer I would like to be remembered as someone who was able to sustain a band of unquestionable individual talent, and push it to the forefront during its working career. I think I really captured the best of our output, growth, change and maturity on tape - the multifaceted gem that is Led Zeppelin.

I don't deal in technique. I deal in emotions.

You can't just find yourself doing something and not happy doing it.