There is far more sensitivity in acoustic guitar players than could ever be compared to any synthesizer. That's a personal point of view but that's the way I see it. I think that's what it's all about. The drive, the fire, the passion - it all comes out on the guitar.

I'm not interested in turning anybody on to anybody that I'm turned on to... if people want to find things, they find them themselves.

You never knew what was going to happen in concert. It was a really exciting prospect to go onstage, and you can hear that in the live recordings ... wherever we were and whatever year it was, we always went onstage determined to do our best.

I'm not a guitarist as far as a technician goes, I just pick it up and play it. Technique doesn't come into it.

My guitar style was developed during that 10-year period. That's me. That's the way I play, and I don't wish to play any other way. Our own individual identities are firmly stamped on this album.

Well, Led Zeppelin IV! That's it really. I'll tell you why the album had no title - because we were so fed up with the reactions to the third album, that people couldn't understand why that record wasn't a direct continuation of the second album. And then people said we were a hype and all, which was the furthest thing from what we were. So we just said, `let's put out an album with no title at all!' That way, either people like it or they don't... but we still got bad reviews!

The idea of a hypnotic riff as the prime mover of a piece of music has been around for a long time, whether you're talking about the Delta blues or music from Middle Eastern and African cultures.