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This lecture-recital investigated the lineage of French composers who were influenced by jazz during the first half of the twentieth century, with a focus on compositions from the solo trombone repertory. Historically, French composers, more than those of other European countries, showed an early affinity for the artistic merits of America's jazz. This predilection for the elements of jazz could be seen in the selected orchestral works of Les Six and the solo compositions of the Paris Conservatory composers. An examination of the skills of major jazz trombonists early in the twentieth century showed that idioms resulting from their unique abilities were gradually assimilated into orchestral and solo repertory. Orchestral works by Satie, Milhaud, and Ravel works showing jazz traits were investigated. Further, an expose of the solo trombone works emanating from the Paris Conservatory was presented. Although written documentation is limited, comparisons between early recorded jazz trombone solos and compositions for orchestral and solo trombone was established. These comparisons were made on the basis of idiomatic jazz elements such as high-tessitura ballad melodies, blue tonalities and harmonies, syncopated rhythms, and many of the aspects of style associated with improvisation. All major French solo trombone repertory to mid-century was surveyed and examined.

The evolution of the role of the trombone as a solo instrument in the nineteenth and twentieth centuries can be traced most effectively through four schools of playing, with the music of today's avant-garde being a logical historical culmination of these four schools. It will be demons t rated that the avant-garde's use of the solo trombone has merely continued the evolutionary process started in the early nineteenth century. The contribution of the early nineteenth-century virtuosi was the establishment of the idea that the trombone could compete on its own terms with other instruments as a solo instrument. In addition to expanding the technical capabilities, they also left a basic solo repertoire. With the death of the virtuosi the trombone as a solo instrument went into a decline. For the remainder of the nineteenth century and well into the twentieth century the Paris Conservatoire was influential. Standards of solo performance were brought to new heights by excellent study material and contest solos. The next important step came from the late nineteenth-century American band virtuosi. Their influence helped the public to accept the idea of the trombone as a solo instrument. The American jazz trombonists of the 1930's and 1940's also further widened the technical capabilities of the trombone and also further encouraged acceptance of the Instrument in its solo capacity. However, their most important contribution was in new tonal colors. The music of the avant-garde takes all these previous historical achievements and makes use of them in its own unique way.

The purpose of this dissertation is to investigate and document the compositional components and innovations in the compositional style of Jean-Michel Defaye as they relate to two of his works for solo trombone, Deux Danses (1953, trombone and piano) and Fluctuations (1980, trombone solo, six trombones and two percussionists.) This document investigates the circumstances surrounding the creation of each piece as well as the compositional processes of Monsieur Defaye. Jean-Michel Defaye is an important composer for his commitment to the quality and challenge of the trombone literature he creates. The importance of Deux Danses is in the fact that it was this piece that put Defaye in the international spotlight. Solo works with chamber ensemble, such as Fluctuations, must be more seriously considered for performance if the standard solo repertoire for trombone is to be further expanded. Jazz style is an integral part of both of these important works and a necessary component to fully realize the composer's intent. Monsieur Defaye has demonstrated a commitment to composing for the instrument over the long term and has a sustained interest in participating in the further development of serious literature for all brass instruments. This study will add to the limited published material on Defaye and is intended to further the cause of research into the works of this important composer.

The dissertation consists of four recitals: three solo recitals and one lecture recital. The repertoire of all the programs was intended to demonstrate a variety of music written originally for trombone. The lecture recital, "The Trombone in German and Austrian Concerted Church Music of the Baroque Period," was presented on July 3, 1974. The lecture was an attempt to illuminate the position of the trombone, both as an ensemble instrument and as a solo obbligato instrument, in church music of the Baroque period. The program included the performance of two works by Heinrich Schutz for bass voice, four trombones, and continuo; one work by Andreas Hammerschmidt for alto, bass, trombone, and continuo; and one work by Johann Joseph Fux for soprano, trombone, two violins, and continuo. A line of influence was traced from the Venetian composers Giovanni Gabrieli and Claudio Monteverdi, through Schiitz, Hammerschmidt, and Fux, to Mozart.

Many, if not most, student trombonists have perhaps had little or no previous experience with "extended techniques"-novel or unconventional modes of sound production. To address this deficiency of experience, this document sets forth a progressive sequence of descriptive explanations and supplementary studies, which are specifically designed to assist trombonists in mastering the particular extended techniques that will prepare them to perform three of the most popular late Twentieth-Century pieces for trombone that include extended techniques-Luciano Berio's Sequenza V, Folke Rabe's Basta, and Mark Phillips' T.Rex. Following the introductory chapter, the body of the document consists of three chapters, each of which deals with one of the three solos, presenting descriptive explanations of relevant extended techniques interspersed with performance commentary (solicited from prominent trombonists) and supplementary studies (composed by the author). The studies presented in each chapter are specifically geared toward mastering the extended techniques as they relate to the music of each particular solo. They are also especially focused toward learning the more difficult passages of music in each solo.