Despite insisting it was not programmatic, this composer scored a three-movement “war symphony” for the New York Philharmonic to reels of goose-stepping soldiers and other battle footage. A piece by this composer features a recurring triple-stop chord with a low D, middle E, and high A spread across two octaves, whose (10[1])playability surprised Samuel Dushkin. (10[1])Each movement of this composer’s violin concerto opens with that “passport chord.” (10[1])This composer (10[1])used a 3-plus-3-plus-2 rhythm (-5[1])in the finale of one octet to adapt a khorovod, which he also used in another (10[1])work’s “Round Dance of the Princesses.” This composer wrote the Dumbarton Oaks Concerto during his Neoclassical (10[1])Period, when he also revised (10[1])a ballet in which Koschei (10[1])(“kuh-SHAY”) the Deathless dances an Infernal Dance. For 10 points, name this composer of The Firebird. ■END■ (10[1])