The Art of Noises

The Art of Noises (L'arte dei Rumori) is a Futurist manifesto, written by Luigi Russolo in a 1913 letter to friend and Futurist composerFrancesco Balilla Pratella. In it, Russolo argues that the human ear has become accustomed to the speed, energy, and noise of theurban industrial soundscape; furthermore, this new sonic palette requires a new approach to musical instrumentation and composition. He proposes a number of conclusions about how electronics and other technology will allow futurist musicians to "substitute for the limited variety of timbres that the orchestra possesses today the infinite variety of timbres in noises, reproduced with appropriate mechanisms"
http://en.wikipedia.org/wiki/The_Art_of_Noises