Longest piece?

[Peter]

http://www.telegraph.co.uk/culture/m...cal-music.html

Isn't The Ring cycle longer?!!

[Chris]

Not to mention John Cage's Organ²/ASLSP - that could last pretty much forever, though the ongoing performance that is set to last 639 years is probably good enough. I hope they are recording it so I can buy it on CD in the year 2640.