It’s a funny contradiction because when we started playing instruments as kids, the thing we didn’t want to do was jam. We wanted to have an idea. We wanted structure. Jamming was like this way of sharing the spotlight, where everyone got their own solo, every individual got their own moment to shine. When we were growing up, that’s how we thought of it. Eventually we embraced this more freeform approach. I wouldn’t call it jamming, but maybe it’s more about exploring.

I don’t begin with a material. I begin with a problem. If a material can solve that problem, then I become interested in it. Sometimes it is paper, sometimes timber, sometimes carbon fibre. There are many materials we still don’t use efficiently. I think there is always room to discover new possibilities, every project presents a different problem, and I am always thinking about how to solve it more simply, with fewer materials or a better structure. I think every material has good and bad qualities. The important thing is understanding them and using them appropriately.

I usually start with a structure. The structure is quite rigid. So I have a strong form or frame. A work like Einstein on the Beach is like that: Act One, Two, Three, Four. Act One is A and B. Act Two is C and A. Act Three is B and C. And Act Four is all three together, A, B, and C. So, I knew it was going to be based on theme and variation, and once I get that, I can be freer to fill in the form. Without it, I don’t know how to fill it in – it’s like an architect builds an apartment building: you can live in the building, I can live in the building, other people can live in the building. They each have their apartment to their own liking, but the building has a cohesion because the architect has built it.

I know what you mean, but there are two kinds of voids, the one that you work with and the one that you bear. I work with and try to generate a void. I pick up the guitar and I let my mind wander until it gets distracted and suddenly it lost its purpose. It’s just wondering between one chord and the other, one subject or the other, or maybe I would just be distracted watching a film and something moves me, or the light in the window and then I let that feeling guide me. I always use this metaphor. It’s like getting into a garden at night and suddenly perceiving a perfume of a tree or a flower. You don’t know exactly where it’s coming from, but you know there’s something there, so you start sniffing around until you find it. You get closer and closer to the source until you identify it. That’s the way I write. What I mean is that suddenly something crosses my mind and I just follow that. I try not to lead at the beginning. I try to follow and then whenever I find that I take, I use reason and I organize. I say, “Wait, I need a second part with the same structure. I need a bridge. I need a chorus. Let’s go. Let’s move to this place. Let’s change this rationally,” but the core has to be subconscious.