Hear great piano playing from Emanuel Ax today on IPR. This afternoon, Barney Sherman broadcasts Ax's powerful new recording of Beethoven's "Eroica Variations," and tonight the New York Philharmonic (where Ax is artist-in-residence) features him in Mozart's Piano Concerto no. 25, a work that was a major inspiration for Beethoven. Ax, a Polish-born American, is best known as recital partner of Yo-Yo Ma, but if you haven't heard his solo work lately you are in for a treat.