The word 'archive' seems so reassuring, but I have a lot ofconcern over the longevity of documentary materials.

As there are more online archives of improvised music, it becomes more like the daily practice of playing it. It lessens the idea of there being masterpieces of improvised music through benchmark recordings.

In eighteenth-century England, there was a practice of hiring a picturesque hermit who would inhabit the beautiful ruin on your estate. To me it rhymes with certain kinds of pop-music entertainers and eccentrics - both touted and tolerated.

Chance in music doesn't have to involve the I Ching or rolling dice or throwing yarrow stalks. It can involve an out-of-tune guitar, or other impossible-to-replicate moments of awkwardness - even more so than an awkward, out-of-tune live performance, because there's something incredible about the way that an out-of-tune guitar becomes part of the song on a record. I won't be precious and say it's part of the composition - that's nonsensica l - but chance occurrences are so crucial to what's distinctive. It's the fingerprints all over so many of these recordings.

The instrumental pieces are compositions, certainly, although that's not the language that I instinctively use. They're not scored, and arrangements are often arrived at collaboratively. I always choose to play with people whose input I desire.

There's a book of interviews with John Cage by Joan Retallack called Musicage that was finished the summer that he died, in 1992. And in one of the last interviews, he was very excited to talk about nanotechnology. There's real technophilia from him, a kind of utopian embrace of the idea that nanotechnology will free people up to do what they really want to do.

Records have always been the most extraordinary form of time travel for me, and that's why it matters to know when something was circulated, and if it had an audience of five or 50,000.