Carl Philipp Emanuel Bach, (born March 8, 1714, Weimar, Saxe-Weimar [Germany]—died Dec. 14, 1788, Hamburg), second surviving son of J.S. and Maria Barbara Bach, and the leading composer of the early Classical period.

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A precocious musician who remained successful, C.P.E. Bach was his father’s true successor and an important figure in his own right. In his autobiography he writes: “For composition and keyboard-playing, I have never had any teacher other than my father.” He studied law, taking his degree at Frankfurt in 1735, although he probably never had any intention of a career other than music.

In 1740 he was appointed harpsichordist to Frederick II of Prussia. Frederick was a good flutist and so fond of music that he had his court orchestra accompany him in concerti every night except Mondays and Fridays, which were opera nights. The subservience that he required from his distinguished harpsichordist grew irksome, but it was not until 1767 that Bach was able to resign his Berlin post to take up an appointment as music director at Hamburg. Meanwhile, he had married (1744), published his Versuch über die wahre Art das Klavier zu spielen (1753, rev. ed. 1787; Essay on the True Art of Playing Keyboard Instruments), and acquired an enviable reputation, as a composer, performer, and teacher.

Unlike his elder brother Wilhelm Friedemann, C.P.E. Bach was successful in assimilating the powerful influence of their father and in making the transition into the new style then evolving. This represented a break with the past such as has occurred in very few other periods of musical development. The monumental character of Baroque music gave way to a mercurial Romanticism, for which the favourite contemporary description was “sensitivity” (Empfindsamkeit). Bach became a leader of that movement but retained the advantage of a solid craftsmanship and assurance for which he always gave full credit to his father’s teaching and example.

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C.P.E. Bach’s many compositions include religious music (e.g., a Magnificat, 22 Passions), symphonies, concerti (for flute, harpsichord, piano, harpsichord and piano, organ, oboe), organ sonatas, chamber music, and songs. The music of his Berlin period is comparatively old-fashioned, because of the preferences of his royal employer. In Hamburg he developed a more adventurous vein and did as much as anyone to open up future musical styles. Particularly influential were his symphonies, concerti, and keyboard sonatas in the evolution of classical sonata-allegro form. His influence on Joseph Haydn, W.A. Mozart, and even Ludwig van Beethoven was freely acknowledged, and it is interesting that, having influenced Haydn, Bach later allowed himself to be influenced by the younger composer, just as Haydn later influenced and was influenced by Mozart.

As a performer, Bach was famous for the precision of his playing, for the beauty of his touch, and for the intensity of his emotion. “He grew so animated and possessed,” wrote Charles Burney (Present State of Music in Germany…, 1773), “that he looked like one inspired. His eyes were fixed, his underlip fell, and drops of effervescence distilled from his countenance.”

The influence of C.P.E. Bach’s Essay on Keyboard Instruments was unsurpassed for two generations. Haydn called it “the school of schools.” Mozart said, “He is the father, we are the children.” Beethoven, when teaching the young Karl Czerny, wrote, “be sure of procuring Emanuel Bach’s treatise.” It is, indeed, one of the essential sourcebooks for understanding the style and interpretation of 18th-century music. It is comprehensive on thorough bass, on ornaments and fingering, and is an authentic guide to many other refinements of 18th-century performance.