It is unusual for a great musician to begin studying music properly at the age of 18. However, he was old enough to realize that he had a lot to learn. He studied counterpoint and was influenced by the way Classical composers had shaped their music. Beethoven especially was an inspiration for him. One of his best-known works is the "Concerto for Double String Orchestra" (1938-1939). It shows his love of folk music as well as interest in English music of the Renaissance. This music is exciting because of its beats, which keep changing, and its dance-like character.