Last year, "New Zealand's fourth most popular folk parody act" were still late-night Fringe underdogs. This year, they are greeted like rock gods. With their superior wordplay, virtuoso musicality and superbly gormless banter, they've taken comedy song to a whole new level. Their latest collection of tunes isn't as spectacularly funny this year, and the venue is more suited to classical music but there's so much right about Bret McKenzie and Jermaine Clement's act that an hour in their company is still sublime.
The marvel last year was that so many musical styles could be recreated on just two acoustic guitars and a toy glockenspiel. This year, the genre-busting intensifies. Clement smoulders through a sub-Barry White sex serenade called It's Business Time. McKenzie barks along to a swaggering, but ridiculously meaningless, ragga anthem: "Enough small boom, let's boom da boom." The focus is on vocal and musical tricks, although one blissful exception is their cri de coeur for the state of the world, Think About It, which would make Marvin Gaye blush. "One thing we're definitely into," deadpans McKenzie, "is issues."
Their chat is more hilarious than ever. On the blurred lines between stage persona and real self ("I just ask myself what I'd do," says McKenzie, "then do it"), they are profoundly funny. This is dazzling conceptual comedy delivered in the voice of a man reading the gas meter. But their relationship is so strong, and their talent so prodigious, they could probably make that irresistible too.
· Until August 30. Box office: 0131-668 1633.
