Two excellent musicians, the cellist Nicolas Altstaedt and the pianist Alexander Lonquich, join forces for an alluring program in the Frick's intimate music room. The lineup features Beethoven's Cello Sonata No. 5, Debussy's Cello Sonata, Britten's Cello Sonata and works by Nadia Boulanger and Webern. (The concert can also be heard via sound system in the Garden Court.)