The book introduces eighteen witnesses of the artist Luigi Russolo (1885-1947), that they space from the epistle to the diary, from the article to the text of conference to the real test. Written between the beginning of Years Ten and 1947, regard “art of the noises” (between which the unknown sonorous film comments of Parisian Avant - Garde), the painting and the architecture, without to omit the reflections that - along every year Thirty - accompanied the experiences tied to occultism and theosophy.