An Argentine composer of contemporary classical music, Alberto Ginastera is considered one of the most important composers of the twentieth century. He composed with writer Manuel Mujica Lainez on the opera Bomarzo. Ginastera was also known outside academia. Rock band, Emerson, Lake, and Palmer adapted the fourth movement of his first piano concerto and recorded it on their popular album Brain Salad Surgery under the name Toccata. The recording not only had the approval of Ginastera, but his support.