It is well known that the 52 concertos for keyboard(s) or other solo instruments of Carl Philipp Emanuel Bach constitute a repertoire that crosses the borderline of Baroque and Classic eras from both a chronological and a stylistic point of view. However, their analogous position concerning the Baroque ritornello form and the various Classic concerto-sonata types is not yet as clear as it should be, since most scholars tend to examine and classify these works in a rather one-sided way, basing their views either on the earlier ritornello form or on both theory and practice of (only) the late eighteenth-century concerto, thus ignoring many important aspects of formal design in Bach's concerto movements in particular. The present paper submits the findings of a comprehensive research on Bach's whole concerto output, clearly distinguishing between movements in ritornello and concerto-sonata forms; furthermore, it highlights the impressive variety of concerto-sonata structural types that Bach uses in his works: ternary but also binary sonata forms with five, four, or three ritornellos, the specific role and function of which (and especially of the intermediate ones) cannot be always restricted to the specifications of even the most recent (and seemingly all-embracing) related typologies.
Caplin, William E. Classical Form: A Theory of Formal Functions for the Instrumental Music of Haydn, Mozart, and Beethoven (New York, NY: Oxford University Press, 1998).
Crickmore, Leon. “C. P. E. Bach’s Harpsichord Concertos,” Music & Letters 39/3 (1958), 227–241.
Davis, Shelley. “H. C. Koch, the Classic Concerto, and the Sonata-Form Retransition,” The Journal of Musicology 2/1 (1983), 45–61.
Davis, Shelley G. “C. P. E. Bach and the Early History of the Recapitulatory Tutti in North Germany,” in C. P. E. Bach Studies, ed. by Stephen L. Clark (Oxford: Clarendon Press, 1988), 65–82.
Galand, Joel. “The Large-Scale Formal Role of the Solo Entry Theme in the Eighteenth-Century Concerto,” Journal of Music Theory 44/2 (2000), 381–450.
Hepokoski, James and Warren Darcy. Elements of Sonata Theory: Norms, Types, and Deformations in the Late-Eighteenth-Century Sonata (New York, NY: Oxford University Press, 2006).
Schulenberg, David Louis. “The Instrumental Music of Carl Philipp Emanuel Bach” (PhD diss., State University of New York at Stony Brook, 1982); also published as The Instrumental Music of Carl Philipp Emanuel Bach (Ann Arbor, MI: UMI Research Press, 1984).
Schulenberg, David. The Music of Carl Philipp Emanuel Bach (Rochester, NY: University of Rochester Press, 2014).
Stevens, Jane R. The Keyboard Concertos of Carl Philipp Emanuel Bach (PhD diss., New Haven, CT: Yale University, 1965).
Stevens, Jane R. “Formal Design in C. P. E. Bach’s Harpsichord Concertos,” Studi Musicali 15/2 (1986), 257–297.
Stevens, Jane R. The Bach Family and the Keyboard Concerto: The Evolution of a Genre (Warren, MI: Harmonie Park Press, 2001) = Detroit Monographs in Musicology / Studies in Music, vol. 31.