It's a basic human impulse: to fight with another person to see who's the best or the bravest. But some human battles are not fought with weapons of destruction. They're fought with music. On this week's Sound & Spirit, host Ellen Kushner takes us into the world of these musical battles, from American jazz "cutting contests" to ancient Indian drumming competitions to modern Rap artists and Caribbean calypso. From the Inuit of the Arctic Circle to Beethoven and his friends, musicians just can't resist it - and neither will you!