Virtuoso is a term applied to many of the world's top pianists of today. With its roots in the Italian usage of the 16th and 17th centuries, a virtuoso is an individual who possesses outstanding technical ability in any intellectual or artistic field. But it takes much more than just playing demi-semi quavers on a keyboard to dazzle an audience. So what are the true qualities of virtuosity and which particular composers are regarded as virtuosi, writing music to show off their own technical prowess at the keyboard? Featuring Lang Lang, Angela Hewitt and Stephen Hough.