 Gilardi experimented with the pentatonic scale and Americas' Indigenous music.Some of their works are the operas "Ilse" (1923) and "La leyenda del Urutaú" (The legend of the Urutaú) (1935), "Primera serie argentina", (First Argentine series), "Evocación quechua", "Gaucho con botas nuevas" (Gaucho with new boots) (1938, orchestra), a symphonic poem which won a national prize in 1939.Among his religious music "Réquiem" (1933) and "Misa de Gloria" (Glory Mass) (1936) are particularly esteemed.