Carl Philipp Emanuel Bach (1714, 1788) was a towering figure in keyboard music who bridged the Baroque and Classical worlds. The eldest son of J.S. Bach, he surpassed his father's keyboard output and became the most performed keyboard composer of his lifetime, revered across Europe for works that combined technical brilliance with emotional depth.
Bach's keyboard compositions were laboratory experiments in what the instrument could express. He wrote prolifically for both harpsichord and the emerging fortepiano, and his six collections of keyboard sonatas shaped how later composers approached the form. His influence on Haydn, Mozart, and Beethoven was profound and direct.