When I read John Cage's book Silence, I was growing up in Louisville, Kentucky. For me, records were a mode of time travel and geographic travel, interfacing with a much larger world. So it seemed antiquated and backwards that Cage would be so down on them.

What a strange thing - that musicians grant permission to places like Ubuweb, and then because it's free, it'll probably be listened to more often than something that is still wrestling with this idea of making a profit.

If the records that I make have one thing in common, it's that there is little recapitulation, and the idea is that it should end in a place very different from where it began, and that you've heard musicians undergo a change or be irreversibly transformed.

Kenny Goldsmith from Ubuweb describes himself as an amateur archivist, and people can download files from Ubuweb - it's not a streaming service. But it's a miracle that it's still online and they're able to make it work through the donations of server space and volunteer efforts.

I recall improvisational drummer and composer Michael Evans telling me a story of someone who had the opportunity to meet Cage and give him a record, and John Cage just smiled and said, "You know I have nothing to play this on?"

My experience that undergirds that observation comes from punk, where people might have scraped together the money to be in the studio for an afternoon to make a record. Punk isn't a music that you think of as chance-based, but exigency has a lot to do with it.

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.