Johann Sebastian Bach was undoubtedly the greatest musical thinker of his age. Dubbed ‘the Old Testament of music’ by the conductor and pianist Hans von Bülow, The Well-Tempered Clavier is acknowledged to be one of the most significant works ever written for the keyboard. Each of these 24 preludes and fugues encapsulates its own mood, and Bach’s delight in mixing technical strictness with freedom of expression has made this work an indispensable element of Western culture for centuries. Sir András Schiff is heralded as one of the finest Bach interpreters today, and this first complete performance at the prestigious BBC Proms was summed up as ‘stupendous’ by The Independent.