One of the greatest composers of all time. Bach wrote hundreds of pieces for organ, choir, as well as many other instruments. He spent most of his life as a church organist and a choir director. His music combines profound expression with clever musico-mathematical feats, like fugues and canons in which the same melody is played against itself in various ways.
One of Bach's most popular pieces for piano, immortalised by the Glenn Gould recordings, the Goldberg Variations is a set of 30 variations on an aria for harpsichord or piano. This is the main aria in its original form.