Tom Huizenga snarkily shares some interesting tid-bits on over a century of Olympic theme music in NPR's Deceptive Cadence:
A little closer to our own time, don't forget about Czech composer Josef Suk, whose soul-stirring Toward a New Life was written for the 1932 Olympic Games in Los Angeles and won him a silver medal. Bonus points for interjecting, particularly among classical music pretenders, that Suk was the son-in-law of the great Czech composer Antonin Dvorak.
Philip Glass is hip in almost any context. The prolific and expeditious composer (who once worked as a cabbie and plumber) was tapped to write something for the torch lighting ceremony at the 1984 Los Angeles games. He came up with a five-minute piece called The Olympian (below), and later commented: “I can think of no event to compare with the Olympic Games which makes us so conscious of our shared humanity, our common fate.” Glass also composed music for the 2004 Greek Olympics. The overly ambitious Orion featured collaborations with seven other composers including Ravi Shankar and Gambian kora player Foday Musa Suso.