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.