Beethoven

Beethoven’s Hammerklavier Sonata is thrilling and brain-twisting. Its nickname derives from the fact that it was published as a sonata ‘for the hammer-action keyboard’, which just means a piano. But the notion of hammering suits this work. It’s his longest sonata — a late one, No. 29 in B flat, Op. 106 — and a mighty piece of machinery. I’ve been listening to it for 40 years and I’m not even close to grasping its details. It’s far more of a mental puzzle than the sublime last trio of sonatas, Opp. 109–111, whose construction is less tortuous. The Hammerklavier has been in and out of my CD player a lot

Last weekend my iPad sucked me deeper into Beethoven’s Ninth Symphony than I thought possible. Deutsche Grammophon and Touch Press have released an app devoted to the work that rendered me slack-jawed with wonder, like a Victorian on his first visit to a cinema. The app gives you four complete performances of the Ninth: by Ferenc Fricsay with the Berlin Philharmonic (1958); Herbert von Karajan with the same orchestra (1962); Leonard Bernstein with the Vienna Philharmonic (1978); and Sir John Eliot Gardiner with his preposterously named Orchestre Révolutionnaire et Romantique (1992). Icons for the performances are next to each other, and the gentlest touch will transport you to and fro.