34. Carl Philipp Emanuel Bach, Versuch über die wahre Art das Clavier zu spielen, II (Berlin: George Ludewig Winter, 1762), 340–341. The chapter was the subject of a searching analytical study by Heinrich Schenker, as “Die Kunst der Improvisation,” in Das Meisterwerk in der Musik (Munich, Vienna and Berlin: Drei Masken Verlag, 1925), now translated, with commentary, by Richard Kramer in Schenker, The Masterwork in Music, ed. William Drabkin, I (Cambridge and New York: Cambridge University Press, 1994), 2–19.