There's nothing particularly funny about most 16th-century choral music, but the young members of the a cappella ensemble Stile Antico cracked themselves up the entire time they sound checked for this Tiny Desk Concert. But when the cameras started rolling, they were all business. Watch the 12-person ensemble perform in the NPR Music offices. Set List: William Byrd: "Vigilate" John Sheppard: "Lord
