When I work there are two distinct phases: the phase of pushing the work along, getting something to happen, where all the input comes from me, and phase two, where things start to combine in a way that wasn't expected or predicted by what I supplied. Once phase two begins everything is okay, because then the work starts to dictate its own terms. It starts to get an identity which demands certain future moves. But during the first phase you often find that you come to a full stop.

I set up situations that involve abandoning control and finding out what happens.

Another way of working is setting deliberate constraints that aren't musical ones - like saying, "Well, this piece is going to be three minutes and nineteen seconds long and it's going to have changes here, here and here, and there's going to be a convolution of events here, and there's going to be a very fast rhythm here with a very slow moving part over the top of it." Those are the sort of visual ideas that I can draw out on graph paper. I've done a lot of film music this way.

If you think of the way a composer or say a pop arranger works - he has an idea and he writes it down, so there's one transmission loss. Then he gives the score to a group of musicians who interpret that, so there's another transmission loss. So he's involved with three information losses. Whereas what I nearly always do is work directly to the sound if it doesn't sound right. So there's a continuous loop going on.

John Cage made you realise that there wasn't a thing called noise, it was just music you hadn't appreciated.

Most of those melodies are me trying to find out what notes fit, and then hitting ones that don't fit in a very interesting way.

I had wanted a tape recorder since I was tiny. I thought it was a magic thing. I never got one until just before I went to art school.