During his lifetime, Johann Christian Bach (1739--1782) was considered the most famous musician of the Bach family throughout England and Europe. Although his music was highly regarded in the eighteenth century, little scholarly work has been undertaken on the historical and analytical aspects of his compositions. His keyboard compositions are valuable in tracing his musical development since this was the only genre that he wrote throughout his career in Berlin, Milan and London. Previous analyses of Bach's keyboard music have mainly focused on stylistic development, thus neglecting the importance of phrase and larger formal functions. / I adopt William Caplin's theory of formal functions to analyze Bach's solo keyboard sonatas: the Solo in A minor from Berlin (1750--55), three sonatas from the Milan collection (1755), six sonatas from London Op. 5 (1767), and six sonatas from London Op. 17 (1773--4). I demonstrate that Bach gradually refines phrase and thematic functions of the exposition of first-movement sonatas. I examine Bach's use of core technique and subordinate theme-like units in development sections and discuss the reasoning behind different recapitulation strategies. I also compare the sonata forms of the first movement to the second and third movements, and discuss other types of large-scale formal design (theme and variations, minuet and trio, and rondo). / Many sources indicate that Mozart was greatly influenced by Bach, but they remain vague in describing the type and extent of this influence. Building on previous melodic, motivic and stylistic studies, I draw important phrase-structural connections between the music of Bach and Mozart. I discuss the construction of Mozart's early piano pieces (KV 6 through K 284) and demonstrate that he adopts particular phrase-structural and thematic designs similar to pieces from Bach's Op. 5 and 17 collections. Through form functional analysis, I illustrate Bach's development of phrase and thematic structures and provide important phrase-structural evidence of his influence on the music of Mozart.

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Valentin Roeser’s Essai d’instruction à l’usage de ceux qui composent pour la clarinette et le cor is the earliest treatise on instrumentation and the first theoretical study of the clarinet. Comparisons are drawn with other eighteenth-century instructional materials, e.g. Francoeur’s Diapason général, La Borde’s Essai sur la musique, and Vanderhagen’s Méthode nouvelle et raisonnée pour la clarinette. A history of the chalumeau and two-keyed clarinet is presented, along with a biographical sketch of Roeser and an English translation of the first section of the Essai. Appendices include a checklist of Roeser’s writings and a list of eighteenth-century music using the chalumeau.

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Thesis--Agra University. / Bibliography: p. 408-432.

This study is about Johann Christian Bach's Opus 11 Quintets for flute, oboe, violin, viola, cello and continuo. The main focus of the research concerns the use of sonata form in these pieces. All the first movements are in sonata form, which was a common practice of his time. The two slow second movements are in sonata form also. In addition, one of the slow movements is sonata form without a development section.This period of time was rich in experimentation. Within Bach's work the variety within these eight sonata-form movements is explored. Essential features of the sonata form as well as Bach's unique originality are evident.In order to be able to historically place these works, the sonata-form movements of Bach's contemporaries and Bach's other types of instrumental works are compared to Bach's Opus 11. Works included for the discussion in this dissertation are the quartets and quintets in mixed instrumentation including one or two woodwind instruments. The closest possible instrumentation to Opus 11 is that of flute and oboe.Bach's music is Italian in tone; however, the Germanic inheritance is evident in the use of polyphonic texture, harmonic depth, and richness of instrumentation. His concern for instrumental color is highly advanced for his time and he virtually pioneers this color effect in an ensemble works. His skillful use of sonata form and instrumentation is the pathway that Mozart promoted.

Thesis--Agra University. / Bibliography: p. 408-432.

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