Edgard Victor Achille Charles Varèse (French: [ɛdɡaːʁ viktɔːʁ aʃil ʃaʁl vaʁɛːz]; also spelled Edgar Varèse; December 22, 1883 – November 6, 1965) was a French-born composer who spent the greater part of his career in the United States.
Varèse's music emphasizes timbre and rhythm. He coined the term "organized sound" in reference to his own musical aesthetic. Varèse's conception of music reflected his vision of "sound as living matter" and of "musical space as open rather than bounded". He conceived the elements of his music in terms of "sound-masses", likening their organization to the natural phenomenon of crystallization. Varèse thought that "to stubbornly conditioned ears, anything new in music has always been called noise", and he posed the question, "what is music but organized noises?"Although his complete surviving works only last about three hours, he has been recognised as an influence by several major composers of the late 20th century. Varèse saw potential in using electronic media for sound production, and his use of new instruments and electronic resources led to his being known as the "Father of Electronic Music" while Henry Miller described him as "The stratospheric Colossus...
Definition from Wikipedia – Edgard Varèse
Ionisation (1929–1931) is a musical composition by Edgard Varèse written for thirteen percussionists. It was among the first concert hall compositions for percussion ensemble alone, although Alexander Tcherepnin had composed an entire movement for percussion alone in his Symphony No. 1 from 1927.The premiere was at Carnegie Chapter Hall, an annex to New York City's Carnegie Hall, on March 6, 1933, conducted by Nicolas Slonimsky, to whom the piece was later dedicated. One critic described the performance as "a sock in the jaw."
Definition from Wikipedia – Ionisation (Varèse)