A non-verbal art directly linked with physiological arousal that can be measured by scientific instruments. (Storr, Anthony. Music and the Mind. p 148-149. NY: Ballantine Books, 1992.)

Per Edgard Varese, music is organized sound. (Levitin, Daniel J. This is Your Brain on Music: The Science of a Human Obsession. p 14. NY: Plume/Penguin, 2007.)