 In 1948 Schaeffer formally initiated "research in to noises" at the Club d'Essai and on 5 October 1948 the results of his initial experimentation were premiered at a concert given in Paris .Five works for phonograph (known collectively as "Cinq études de bruits"—Five Studies of Noises) including "Étude violette" ("Study in Purple") and "Étude aux chemins de fer" (Study with Railroads), were presented.By 1949 Schaeffer's compositional work was known publicly as "musique concrète" .