Why is Yo-Yo Ma pointing to his recital buddy, Emmanuel Ax? Find out why Ax is IT this afternoon when Barney Sherman plays his new recording of Schumann's Symphonic Etudes, and again at 7PM, when Ax performs a Haydn concerto with the New York Philharmonic. As you'll hear, no pianist plays Schumann and Haydn better. Also on the New York Philharmonic program: Christopher Rouse's Symphony no. 3 (his take on Prokofiev), and music director Alan Gilbert's symphonic synthesis of music from Wagner's Ring Cycle.