The lecture recital was given April 16, 1971. An Excellent Meane, six settings of Gloria Tibi Trinitas, Eterne rerum conditor, and Te Deum laudamus by William Blitheman, In Nomine by John Taverner, and Ecce tempus idonem by Thomas Tallis were performed, together with a choir of four men's voices, following a lecture on various aspects of organ music in early Tudor England. In addition to the lecture recital, three other public recitals, all solo programs, were performed. The first solo recital, including works of Dietrich Buxtehude, Johann Sebastian Bach, Paul Hindemith, and Max Reger, was performed on March 14, 1971. On October 23, 1972, the second solo recital was performed. The program included compositions by Olivier Messiaen, Johann Sebastian Bach, Cesar Franck, and Charles-Marie Widor. On October 17, 1977, the third solo recital, including works by Johann Sebastian Bach, Girolamo Frescobaldi, Johann Jacob Froberger, Dietrich Buxtehude, James Hathaway Tallis, and Maurice Durufle, was performed. The four programs were recorded on magnetic tape and are filed with the written version of the lecture as a part of the dissertation.

This dissertation is an analysis of two of the six sonatas for organ using rhetorical-musical prescriptions from seventeenth and eighteenth-century German theorists. It undertakes to examine the way in which lines are built by application of figurae, to observe the design of each of the six movements, and to draw conclusions concerning implications for performance based upon the use of figurae in specific contexts. The period source on melodic design and the ordering of an entire movement based upon principles of rhetoric is Johann Mattheson's Per volkommene Capelmeister (1739). Guidelines for categorization of figures derive from the twentieth-century writers Timothy Albrecht, George Buelow, Lena Jacobson, and Peter Williams. Chapter I provides justification for the rhetorical approach through a brief description of the rise of the process as applied to composition during the Baroque period by relating Bach's own familiarity with the terminology and processes of rhetorical prescription, and by describing the implications for performance in observing the sonatas from the rhetorical viewpoint. Chapter II deals with the process of composition by rhetorical prescription in (1) the invention of the subject and its figural decoration and (2) the elaboration of the subject through the sixpart discourse of an entire movement. Specific figures of decoration are defined through examples of their use within the context of the sonatas. Chapter III constitutes the analysis of the six sonata movements. Chapter IV reinforces the justification of this type of analysis. The figures, as aids for inflection and punctuation, affect decisions concerning articulation of events and assist in effecting convincing performance.

The lecture recital was given July 10, 1973. The Symphonie-Passion by Marcel Dupre was performed following a lecture on various factors that influenced the development of the organ symphony in France. In addition to the lecture recital, three other public recitals were performed, including solo compositions for the organ and three chamber works for organ and instruments. The first solo recital, including works of J. S. Bach, P. Hindemith, L. Sowerby, and L. Vierne, was performed on June 4, 1969. On April 17, 1970 the second solo recital was performed. Compositions by J. S. Bach, D. Buxtehude, M. Duprd, N. Dello Joio, S. Karg--Elert, and J. Langlais were included in the program. On January 25, 1971, a program of organ chamber works by N. Lockwood, D. Pinkham, and F. Martin, as well as solo works by F. Lizst, W. Latham, and Marcel Duprl, was performed. The four programs were recorded on magnetic tape and are filed with the written version of the lecture as a part of the dissertation.

The lecture recital was given on March 25, 1984. Commotio by Carl Nielsen was performed following a lecture on that particular organ composition. The lecture included a discussion of Carl Nielsen, characteristics of his six symphonies, a detailed analysis of Commotio, and the symphonic characteristics found in Commotio. Some examples from the symphonies as well as other works were performed during the lecture to illustrate the similarities between Commotio and his orchestral works. In addition to the lecture recital, three other public recitals were performed, all of which consisted of solo compositions for the organ. The first solo recital, including works of Couperin, Bach, Hindemith, and Duruflé, was performed on October 30, 1980. On May 6, 1981, the second solo recital was performed. Compositions by Raison, Buxtehude, Bach, Reger, and Martin were included in the program. The third solo recital which included works by Weckmann, Tunder, Lübeck, C. P. E. Bach, and Vierne, was performed on April 25, 1983. The four programs were recorded on magnetic tape and are filed with the written version of the lecture material as a part of the dissertation.

The lecture recital was given February 16, 1976. A discussion of the development of form in the German organ sonata from Mendelssohn to Rheinberger was presented. A performance of representative sonatas by Mendelssohn and Rheinberger was included with the lecture. Two solo recitals and one chamber recital were presented as public recitals in addition to the lecture recital. The first solo recital, on July 2, 1970, included works of Buxtehude, Roger-Ducasse, Bach, and Sowerby. The chamber recital, given with Betty Lambert, soprano, on July 31, 1973, consisted of works by Bach, Pepping, Pinkham, Reger, and Bornefeld. The second solo recital, on April 17, 1978, included works by Lubeck, Balbastre, Bach, Mathias, Karg-Elert, and Dupré. All four programs, recorded on magnetic tape, are filed, along with the written version of the lecture material, in the North Texas State University library.

The lecture recital was given July 22, 1974. A discussion of the tientos of Cabezon, Aguilera de Heredia, Coelho, Correa de Arauxo, and Cabanilles included an analysis of eight specific works, a comparison of styles, and information about performance practices. The eight works were then performed. In addition to the lecture recital three other public recitals were performed, consisting entirely of solo literature for the organ. The first solo recital, on July 2, 1971, included works of Titelouze, deGrigny, Franck, and Alain. The second solo recital, on June 18, 1973, consisted of works by Bach, Klebe, Bruhns, Reger, Heiller, and Liszt. The final solo program, on June 7, 1974, included works by Boyvin, Buxtehude, Mozart, Alain, and Reger. All four programs, recorded on magnetic tape, are filed, along with the written version of the lecture material, in the North Texas State University library.

The lecture recital was given on August 9, 1974. Chorale partitas by Sweelinck, Scheidt, B051hm, and Walther were performed following a lecture on the chorale partita in the Baroque period. The lecture included a discussion of the instruments that the partitas were written for and the functions for which they were written. The works of Sweelinck and Scheidt and their influence on later composers were discussed. A number of lesser-known composers and their works were mentioned. Also, there was a discussion of works by well-known composers such as Bohm, Pachelbel, Buxtehude, Walther, and Bach. In addition to the lecture recital, three other public recitals were performed, all of which consisted of solo compositions for the organ. The first solo recital, including works of Buxtehude, Bach, Walther, Pepping, ?ranck, Alain, and Durufle, was performed on July 18, 1971. On August 13, 1972 the second solo recital was performed. Compositions by Greene, Stanley, Searle, Willan, Dandrieu, Roger-Ducasse, and Langlais were included in the program. The third solo recital, which included works by Sweelinck, Bach, Guillou, and Reubke, was performed on June 5, 1974. The four programs were recorded on magnetic tape and are filed with the written version of the lecture material as a part of the dissertation.

This dissertation is concerned with the relationship between the trumpet and organ in twentieth-century music for this ensemble and how that relationship effects performance with regard to organ registration and synchronization. The compositions discussed include "The Other Voices of the Trumpet," by Daniel Pinkham (1971); "Jericho: Battle Music," by William Albright (1976); "Three Pictures of Satan," by Jere Hutcheson (1975); and "Okna," by Petr Eben (1980). The theoretical writings of Pierre Boulez, Robert Erickson, and Donald Cogan deal with developing a contemporary concept of texture. This dissertation applies their theory that texture exists in two dimensions: vertical and horizontal. Stratification and blending of timbres comprise the vertical dimension. The succession of textures, governed by tempo, creates the second dimension. Chapter I provides an historical setting for the genre, introduces the theory of Boulez, Erickson, and Cogan, and supplies the programmatic content of the four works chosen for analysis. In Chapter II , the vertical elements of texture in these four works are isolated and examined. Chapter III deals with Pierre Boulez's theory that the succession of textures, governed by tempo, shapes the work. Each work is examined with regard to tempo, either mobile (fluctuating) or fixed. In Chapter IV the analysis is related to performance. Stratified textures, fused ensemble timbres, and their horizontal progression present problems for the ensemble in organ registration and synchronization. There are general guidelines given for registration as well as specific registration problems encountered in stratified textures and fused ensemble timbres. Synchronization, or coordination of events is the second challenge presented by the horizontal progression of textures.

The Two Etudes: "Harmonies," and "Coulée" and the Volumina of Ligeti were performed following a lecture on avant-garde techniques in organ works of György Ligeti. The lecture included a brief discussion of earlier twentieth century antecedents of new sound materials and concepts, a biographical sketch of Ligeti and general style features of his works. The main body of the lecture included notational methods, specific style features, and performing scores of Ligeti's three organ works. In addition to the lecture recitals three other public recitals were performed which consisted of solo compositions for the organ.