What do these notable persons all have in common: Jane Goodall, Noam Chomsky, Tony Hoare (fyi: he did quicksort and communicating sequential processes), John Cage, Isamu Noguchi (aka LaPorte, Indiana's Sam Gilmour), and Karl Popper? They were all Mac users! No, just kidding. They all accomplished this -- Cage in 1989. At that time, Cage wrote:
...Harmony through a percussion composer, Edgard Varèse, is being brought to a new open-ended life by Tenney, James Tenney. I called him last December after hearing his new work in Miami and said "If this is harmony, I take back everything I've ever said; I'm all for it." The spirit of percussion opens everything, even what was, so to speak, completely closed.
One thing Cage’s work does is make you stretch your ears to be sure you heard something.