There are different reasons, values, and goals for using sound in performance.

Wagner

Luigi Russolo

Pierre Schaeffer

Pierre Henry (0:00 and 10:00)

Edgard Varèse, Ionisation

Edgard Varèse, Poème Électronique

John Cage, 4’33”

https://www.youtube.com/watch?v=zY7UK-6aaNA

John Cage, Inlets

Tom Johnson, Failing