Retro, 20th century chamber music by the Fredonia faculty, presents Bartok's "Sonata for Two Pianos and Percussion" in concert. Pianists Mary Marden Cobb and Phyllis East and percussionists Karolyn Stonefelt and Matthew Wilson perform. Dr. Michael Markham will make a presentation. Some Rachmaninoff song transcriptions for two pianos will open the program on a lyrical note. Free.