Elie Siegmeister (also published under pseudonym L. E. Swift; January 15, 1909 in New York City – March 10, 1991 in Manhasset, New York) was an American composer, educator and author.
His varied musical output showed his concern with the development of an authentic American musical vocabulary. Jazz, blues and folk melodies and rhythms are frequent themes in his many song cycles, his nine operas, his eight symphonies, and his many choral, chamber, and solo works. His 37 orchestral works have been performed by leading orchestras throughout the world under such conductors as Arturo Toscanini, Leopold Stokowski, Dimitri Mitropoulos, Lorin Maazel, and Sergiu Comissiona. He also composed for Hollywood (notably, the film score of They Came to Cordura, starring Gary Cooper and Rita Hayworth, 1959) and Broadway (Sing Out, Sweet Land, 1944, book by Walter Kerr).
His Western Suite was premiered by Toscanini and the NBC Symphony Orchestra during a broadcast concert on November 25, 1945, in NBC Studio 8-H. Maurice Abravanel and the Utah Symphony Orchestra later made a stereo recording of the music, which incorporates familiar cowboy tunes. Biographer Mortimer Frank said Toscanini's premiere (preserved on transcription discs) is a remarkable performance led by a conductor whose roots went not to the Old West but the Parma conservatory.
Siegmeister wrote a number of important books on music, among them "Treasury of American Song" (Knopf, 1940–43, text coauthored with Olin Downs, music arranged by Siegmeister), second edition revised and enlarged (Consolidated Music Publishers); "The Music Lover's Handbook" (William Morrow, 1943; Book-of-the-Month Club selection), revised and expanded as "The New Music Lover's Handbook" (1973); and the two-volume "Harmony and Melody" (Wadsworth, 1985), which was widely adopted by college and conservatory curricula. In 1960, Siegmeister also recorded and released an instructional album of music, Invitation to Music, on Folkways Records, on which he discusses the fundamentals of music.