Music composed by Roberto Cacciapaglia for soprano, counter-tenor, and instrumental ensemble, based on the poem "De rerum natura" ("On the Nature of Things") by first-century Roman poet and philosopher Titus Lucretius Carus. The wok was commissioned for the Aterforum festival in Ferrara, Italy, and premiered on July 9, 1988. This is the first release of a performance recorded live at Glance Studio, Milan, Italy, on June 28, 1988. Produced by Roberto Cacciapaglia and Gianpiero Dionigi.