Glenn Gould (September 25, 1932- October 4, 1982) was a Canadian pianist, world famous as an interpreter of Johann Sebastian Bach's piano and keyboard works. His technical proficiency was praised, but he was also known for his eccentricities, even when playing.
"lf you know where the melody is going to go, how long it takes to get there and what it's going to do when it gets there, then why bother to listen to it," he says. He makes an exception of Bach, but only if it's played by Glenn Gould, because he "twists the stuff so that at least there's a question mark inserted into the composition". Gould's "mutation" renders it tolerable for Zappa to listen to." (Nigel Leigh in Zappa Plays On)