It feels like Radiohead are famous, but that no one knows who we are. Which is brilliant, really.

I can remember soundtracks that you just can't separate from the film - It's just so intertwined, so important. Like the Hitchcock ones where they kind of inform each other and become this larger thing as a result.

I think I'll always feel a little in awe whenever I see someone in their 20s or 30s carrying a cello or violin case - because I know, if they're doing it professionally, how many years of practice have gone into being able to make music with them. And the sounds they can make just hit me very hard, and feel full of limitless complexity.

Composers are influenced by all the important music in their lives - and I suppose that since radio started playing popular music, that's as likely to be The Beatles or Aphex Twin as it is to be Verdi or Ravel. They'd be strange teenagers if they didn't. But cross-pollinating happens too - Aphex Twin did more interesting things with electronic music than most trained composers, who seemed to approach samplers with undue caution and reverence in those early days.

I was just very conscious that I could either bore people by having the music be similar for too long, or I could just wear them out and bore them in a different way by having it changing too much every minute or two minutes. So, there was that kind of balance to get right.

I suppose subconsciously I was thinking in terms of having the scale of it matching the scale of the images. Hence the sort of string quartet, jazz band and electronic stuff.

I sometimes feel a bit embarrassed to play guitar. There's something - I don't want to sound ungrateful - but there's something very old-fashioned and traditional about it. You meet kids today whose grandparents were in punk bands, really. It's very old and traditional, But then, you know, so is an orchestra and so is the string section.