Renowned harpsichordist and UC Berkeley musicologist Davitt Moroney will perform a unique weekend-long marathon of J. S. Bachs masterpiece "The Well-Tempered Clavier" Books 1 and 2 October 24 & 25 presented by Cal Performances at Hertz Hall. How does he prepare for such a Herculean effort? Watch and listen as Prof. Moroney explains. (Length: 3:00)