As the Russian Orthodox Church prepares to celebrate Easter, Sean Rafferty explores its musical history and traditions and asks what it is about the music that touches so many people. Music includes at 5.50 Mendelssohn's Rondo Capriccioso in E, Op 14, played by Mikhail Pletnev (piano); at 6.00 Arriaga's Los Esclavos Felices performed by the Capella Reiai de Catalunya under Jordi Savall; and at 6.50 Strauss's Introduction, Theme and Variations in E flat played by Barry Tuckwell (horn) and Vladimir Ashkenazy (piano).