The New York Times has called Murray Perahia the “poet of the keyboard.” He appears tonight at 7:30 at Severance Hall to play Beethoven's Piano Concerto No. 4 with the Cleveland Orchestra. The concert will conclude with two landmark works of the 20th century. Guest speaker Cicilia Yudha, an assistant professor of piano at Youngstown State University, gives the pre-concert talk beginning an hour before the concert. Performances repeat at 8 tomorrow night and at 8 on Saturday night. Tickets start at $29. (Niesel)