Having previously recorded with singer-songwriters Tom Brosseau and Josh Ritter, celebrated violinist Hilary Hahn has made another stylistic left turn with "Silfra," an evocative collaboration with avant-garde composer-pianist Volker Bertelmann, who performs under the name Hauschka. Using a piano augmented by ping-pong balls and other surprises, Haushka forms an intriguing counterpoint to Hahn's excursions, making the album's 12 atmospheric compositions sound like scores for surreal short films. The El Rey, 5515 Wilshire Blvd., L.A. 7 p.m. Sat. $40. http://www.theelrey.com.