"I believe that the use of noise to make music will continue and increase until we reach a music produced through the aid of electrical instruments which will make available for musical purposes any and all sounds that can be heard.
Photoelectric, film, and mechanical mediums for the synthetic production of music will be explored. Whereas, in the past, the point of disagreement has been between dissonance and consonance, it will be, in the immediate future, between noise and so-called musical sounds.
The present methods of writing music, principally those which employ harmony and its reference to particular steps in the field of sound, will be inadequate for the composer, who will be faced with the entire field of sound. New methods will be discovered, bearing a definite relation to Schoenberg's twelve tone system and present methods of writing percussion music and any other methods which are free from the concept of a fundamental tone. The principle of form will be our only conxtant connection with the past. Although the great form of the future will not be as it was in the past, at one time the fugue and at another the sonata, it will be related to these as they are to each other: through the principle of organization or man's common ability to think..."
John Cage - "The Future of Music: Credo" in "Silence, Lectures and Writings"
Wesleyan University Press, 1961, p.3-6.