During this time, Nono visited the Soviet Union where he awakened the interest of Alfred Schnittke and Arvo Pärt, among others, in the contemporary practices of "avant-garde" composers of the West. Indeed, the 1960s and 70s were marked by frequent travels abroad, lecturing in Latin America, and making the acquaintance of leading left-wing intellectuals and activists. It was to mourn the death of Luciano Cruz, a leader of the Chilean Revolutionary Front, that Nono composed "Como una ola de fuerza y luz" (1972). Very much in the expressionist style of "Al gran sole", with the use of large orchestra, tape and electronics, it became a kind of piano concerto with added vocal commentary.