“Sound is defined as the result of a succession of regular and periodic vibrations. Noise is instead caused by motions that are irregular, as much in time as in intensity. 'A musical sensation,' says Helmholtz 'appears to the ear as a perfectly stable, uniform, and invariable sound.'”

— Luigi Russolo

But the quality of continuity that sound has with respect to noise, which seems instead fragmentary and irregular, is not an element sufficient to make a sharp distinction between sound and noise. We know that the production of sound requires not only that a body vibrate regularly but also that these vibrations persist in the auditory nerve until the following vibration has arrived, so that the periodic vibrations blend to form a continuous musical sound. At least sixteen vibrations per second are needed for this. Now, if I succeed in producing a noise with this speed. I will get a sound made up of the totality of so many noises--or better, noise whose successive repetitions will be sufficiently rapid to give a sensation of continuity like that of sound.
Source: Russolo. English trans. Barclay Brown (1986: 37).

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Luigi Russolo 11

Electronic music pioneer and Futurist painter 1885–1947

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“Sound is defined as the result of a succession of regular and periodic vibrations. Noise is instead caused by motions that are irregular, as much in time as in intensity. 'A musical sensation,' says Helmholtz 'appears to the ear as a perfectly stable, uniform, and invariable sound.' But the quality of continuity that sound has with respect to noise, which seems instead fragmentary and irregular, is not an element sufficient to make a sharp distinction between sound and noise. We know that the production of sound requires not only that a body vibrate regularly but also that these vibrations persist in the auditory nerve until the following vibration has arrived, so that the periodic vibrations blend to form a continuous musical sound. At least sixteen vibrations per second are needed for this. Now, if I succeed in producing a noise with this speed. I will get a sound made up of the totality of so many noises--or better, noise whose successive repetitions will be sufficiently rapid to give a sensation of continuity like that of sound.”

Luigi Russolo (1885–1947) Electronic music pioneer and Futurist painter

Russolo. English trans. Barclay Brown (1986: 37).
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“This evolution toward noise-sound is only possible today. The ear of an eighteenth century man never could have withstood the discordant intensity of some of the chords produced by our orchestras (whose performers are three times as numerous); on the other hand our ears rejoice in it, for they are attuned to modern life, rich in all sorts of noises. But our ears far from being satisfied, keep asking for bigger acoustic sensations. However, musical sound is too restricted in the variety and the quality of its tones. Music marks time in this small circle and vainly tries to create a new variety of tones... We must break at all cost from this restrictive circle of pure sounds and conquer the infinite variety of noise-sounds.”

Luigi Russolo (1885–1947) Electronic music pioneer and Futurist painter

Source: 1910's, The Art of Noise', 1913, p. 6

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“On electronic music: "The source is electronic, but what you do with it is the same as with acoustic instruments. Sound is sound and vibration is vibration, whether from an electronic source or an acoustic instrument.”

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The way we use these sources is the key in order to define the required musical result. Without neglecting the acoustic conventional instruments, I spend a fair amount of time dealing with the electronic sources of sound. But please do not think computers! Computers are extremely helpful and amazing for a multitude of scientific areas, but for me, when it comes to creation, they are insufficient and slow. Therefore all of my efforts are to stay away from that beast".
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Interviews

“Do not several sorts of Rays make Vibrations of several bignesses, which according to their bigness excite Sensations of several Colours, much after the manner that the Vibrations of the Air, according to their several bignesses excite Sensations of several Sounds? And particularly do not the most refrangible Rays excite the shortest Vibrations for making a Sensation of deep violet, the least refrangible the largest form making a Sensation of deep red, and several intermediate sorts of Rays, Vibrations of several intermediate bignesses to make Sensations of several intemediate Colours?”

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“When played at the right sound level, which is quite high and exciting, the tones in this music will cause your ears to act as neurophonic instruments that emit sounds that will seem to be issuing directly from your head.”

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“Sound is defined as the result of a succession of regular and periodic vibrations. Noise is instead caused by motions that are irregular, as much in time as in intensity. 'A musical sensation,' says Helmholtz 'appears to the ear as a perfectly stable, uniform, and invariable sound.'”

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Luigi Russolo 11

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