On 11 March 1913 he published the treatise The Art of Noises (L'arte dei rumori). He is considered the first theorist of electronic music. Russolo invented and built instruments including intonarumori ("intoners" or "noise machines"), to create "noises" for performance. Unfortunately, none of his original intonarumori survived World War II. Luigi's brother Antonio Russolo also composed futurist music.