by jon » Sat Oct 26, 2013 8:14 am
Closest competitor for that title of Quietest would be a piece of classical music I witnessed live in one of its first performances back in 1975.
A local schoolteacher was required to give a free public concert as part of his Masters degree in Violin at the University of Alberta. I heard a PSA for it on CKUA, and attended.
One of the pieces he "played" was a published classic work that is simply silence for a specific, timed period of time.