There's a scene in the addenda to Dave Eggers's A Heartbreaking Work of Staggering Genius in which the author, while kayaking, is overwhelmed by the sight of a killer whale leaping, Free Willy–style, out of the ocean in close proximity. That scene is all I can think of when trying to describe the impossible ebullience with which Dirty Projectors' Dave Longstreth yelps the words "Bitte orca!" halfway through the recent album of the same name, over an avalanche of avant-Afropop guitar. The album is a revelatory balancing act, as Longstreth's confounding arrangements coalesce again and again into irresistible melodies. (Neumos, 925 E Pike St, 709-9467. 8 pm, $15, 21+.)