Plot: The second concert in Daniel Barenboim's complete survey of the Beethoven symphonies with the West-Eastern Divan Orchestra, as the high-spirited Fourth Symphony is paired with the monumental, mould-breaking Third Symphony, Eroica. The programme also includes a tour-de-force from Pierre Boulez, Dialogue de l'ombre double, performed by clarinettist Jussef Eisa with live electronics from Boulez's music research centre, IRCAM