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Samuel Barber's Symphony No. 2 (1944; revised 1947) was commissioned by the U.S. Army Air Forces. In its original version, Barber incorporated an electronic instrument to imitate radio signals used for air navigation. This effect was later replaced by an E-flat clarinet in the revised version. The symphony is considered to be in the Romantic tradition, a style characteristic of Barber's work, which is known for its lyricism and expressiveness within 20th-century classical music.1

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