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Unlike many composers born into highly musical environments, his early musical career was irregular at best. Political disputes over his birthplace of Istria, then part of the Austro-Hungarian empire, led to instability and frequent moves. His father was headmaster of an Italian-language school – the only one in the city – which was shut down at the start of World War I. The family, considered politically subversive, was placed in internment at Graz, Austria, where the budding composer did not even have access to a piano, though he did attend performances at the local opera house, which cemented his desire to pursue composition as a career. Once back to his hometown Pisino after the war, he travelled frequently.
Dallapiccola took his piano degree at the Florence Conservatory (now known as the Luigi Cherubini Conservatory) in the 1920s. He also studied composition with Vito Frazzi. He became a professor at the conservatory in 1931; until his 1967 retirement he spent his career there teaching lessons in piano as a secondary instrument, replacing his teacher Ernesto Consolo as the older man's illness prevented him from continuing. Dallapiccola's students include Abraham Zalman Walker, Luciano Berio, Bernard Rands, Donald Martino, Halim El-Dabh, Ernesto Rubin de Cervin, Arlene Zallman, Roland Trogan, Noel Da Costa, and Raymond Wilding-White. See: List of music students by teacher: C to F#Luigi Dallapiccola.
Dallapiccola's early experiences under the fascist regime of Benito Mussolini, who governed Italy from October 1922 to July 1943, colored his outlook and output for the rest of his life. He once supported Mussolini, believing the propaganda, and it was not until the 1930s that he became passionate about his political views, in protest to the Abyssinian campaign and Italy's involvement in the Spanish Civil War. Mussolini's sympathy with Adolf Hitler's views on race, which threatened Dallapiccola's Jewish wife Laura Luzzatto, only hardened his stance. Canti di prigionia and Il prigioniero are reflections of this impassioned concern; the former was his first true protest work.
During World War II he was in the dangerous position of opposing the Nazis; though he tried to go about his career as usual, and did, to a limited extent. On two occasions he was forced to go into hiding for several months. Dallapiccola continued his touring as a recitalist – but only in countries not occupied by the Nazis.
Though it was only after the war that his compositions made it into the public eye (with his opera Il prigioniero sparking his fame), it was then that his life became relatively quiet. He made frequent travels to the United States, including appearances at Tanglewood in the summers of 1951 and 1952 and several semesters of teaching courses in composition at Queens College, New York beginning in 1956. He was a sought-after lecturer throughout Western Europe and the Americas. Dallapiccola's 1968 opera Ulisse would be the peak of his career, after which his compositional output was sparse; his later years were largely spent writing essays rather than music.
He had no more finished compositions after 1972 due to his failing health, and he died in Florence in 1975 of edema of the lungs. There are, however, a very few sketches and fragments of work from this period, including a vocal work left unfinished just hours before his death.
It was Richard Wagner's music that inspired Dallapiccola to start composing in earnest, and Claude Debussy's that caused him to stop: hearing Der fliegende Holländer while exiled to Austria convinced the young man that composition was his calling, but after first hearing Debussy in 1921, at age 17, he stopped composing for three years in order to give this important influence time to sink in. The neoclassical works of Ferruccio Busoni would figure prominently in his later work, but his biggest influence would be the ideas of the Second Viennese School, which he encountered in the 1930s, particularly Alban Berg and Anton Webern. Dallapiccola's works of the 1920s (the period of his adherence to fascism) have been withdrawn, with the instruction that they never be performed, though they still exist under controlled access for study.
His works widely use the serialism developed and embraced by his idols; he was, in fact, the first Italian to write in the method, and the primary proponent of it in Italy, and he developed serialist techniques to allow for a more lyrical, tonal style. Throughout the 1930s his style developed from a diatonic style with bursts of chromaticism to a consciously serialist outlook. He went from using twelve-tone rows for melodic material to structuring his works entirely serially. With the adoption of serialism he never lost the feel for melodic line that many of the detractors of the Second Viennese School claimed to be absent in modern dodecaphonic music. His disillusionment with Mussolini's regime effected a change in his style: after the Abyssinian campaign he claimed that his writing would no longer ever be light and carefree as it once was. While there are later exceptions, particularly the Piccolo concerto per Muriel Couvreux, this is largely the case.
Liriche Greche (1942-45), for solo voice with instruments, would be his first work composed entirely in this twelve-tone style, composed concurrently with his last original purely diatonic work, the ballet Marsia (1943). The following decade showed a refinement in his technique and the increasing influence of Webern's work. After this, from the 1950s on, the refined, contemplative style he developed would characterize his output, in contrast to the more raw and passionate works of his youth. Most of his works would be songs for solo voice and instrumental accompaniment. His touch with instrumentation is noted for its impressionistic sensuality and soft textures, heavy on sustained notes by woodwinds and strings (particularly middle-range instruments, such as the clarinet and viola).
The politically charged Canti di prigionia for chorus and ensemble was the beginning of a loose triptych on the highly personal themes of imprisonment and injustice; the one-act opera Il prigioniero and the cantata Canti di liberazione completed the trilogy. Of these, Il prigioniero (1944-48) has become Dallapiccola's best-known work. It tells the chilling story of a political prisoner whose jailor, in an apparent gesture of fraternity, allows him to escape from his cell. At the moment of his freedom, however, he finds he has been the victim of a cruel practical joke as he runs straight into the arms of the Grand Inquisitor, who smilingly leads him off to the stake at which he is to be burned alive. The opera's pessimistic outlook reflects Dallapiccola's complete disillusionment with fascism (which he had naïvely supported when Mussolini first came to power) and the music contained therein is both beautifully realized and supremely disquieting.
His final opera Ulisse, with his own libretto after The Odyssey, was the culmination of his life's work. It was composed over eight years, including and developing themes from his earlier works, and was his last large-scale composition.