The Khan Variations is the first work for solo marimba by Argentinean composer Alejandro Viñao (b.1951). Since publication in 2001, Khan Variations has been performed at many international percussion festivals and is often a repertoire choice for performers in the final round of numerous marimba competitions. This thesis and accompanying lecture recital provide a supplemental guide to Alejandro Viñao's Khan Variations, focusing on analytical and structural theory, as well as performance practice, thus filling the void of information on this piece in the percussion community. Khan Variations was jointly commissioned by twelve of the world's prominent marimba performers and educators, including: Michael Burritt, Jack Van Geem, William Moersch, Robert Van Sice, and Nancy Zeltsman. The project organizer of the Khan Variations commission was Nancy Zeltsman, Chair of the Percussion Department at the Boston Conservatory and a leader in the field of commissioning new marimba works. Utilizing William Moersch's organization New Music Marimba as the financial conduit, Zeltsman and her group issued this commission in 1999. Alejandro Viñao studied composition with the Russian composer Jacobo Ficher in Buenos Aires, and Viñao later went on to complete his doctorate in composition from City University in London. His works span the genres of opera, choir, orchestra, electroacoustic chamber music, and more than twenty film scores. Viñao's composing style is influenced by Mexican-American composer Conlon Nancarrow and Islamic religious music known as Qawwali. Alejandro Viñao's works typically contain complex rhythmic structures and use rhythm as the main element for musical form and development. The impetus for this thesis is to provide a musical analysis and performance guide for The Khan Variations by Alejandro Viñao. This thesis also illuminates the significance of the joint commission led by Nancy Zeltsman, and highlights the influences and inspirations of Alejandro Viñao as a rising composer of international renown.

The music of Alejandro Viñao is driven primarily by rhythm rather than traditional classical music components such as melody, harmony, and formal structures. As such, this focus on rhythm showcases the innovation of multiple time, defined as the musical simulation of various meters and tempi. Pioneered by Conlon Nancarrow, this rhythmic innovation is identified within Water (2013). The purpose of this dissertation is to provide insight and analysis of the specific musical characteristics of Viñao’s compositional style. These characteristics include the use of rhythmic grooves, attractors, echo effect, tenuto markings, Euclidean rhythms, and water imagery. Once this analysis has been completed, this dissertation then highlights the necessary practicalities of performance by discussing aspects such as conducting, rehearsal preparation, setup configuration, mallet considerations, and the technical aspects of performing bongos and congas.

The Peabody Conservatory commissioned Estudios De Frontera by Alejandro Viñao in 2004. Percussionist Robert Van Sice initiated the commissioning process. Estudios De Frontera is the first composition for percussion ensemble by Viñao. Viñao's Estudios is written in two movements. The first is titled Homage to Nancarrow. As the title implies the compositional processes are directly influenced by Conlon Nancarrow. The composer states: "Homage to Nancarrow is concerned with the perceptual illusion of multiple simultaneous speeds or tempi....This movement explores the type of rhythms that create the illusion that multiple independent tempi are being heard while remaining playable by musicians." The purpose of this document is to provide a rhythmic analysis describing the techniques used by Chopin, Ligeti, and Nancarrow, and demonstrating their manifestation in the first movement of Alejandro Viñao's Estudios de Frontera. The analysis provides detailed information in regards to Nancarrow's rhythmic structures including: ostinato, hemiola, isorhythm, accelerations, and implied poly-tempo. Additionally, by seeking advice from notable performers and ensembles, the areas of greatest concern are identified, and strategies towards rehearsal and performance are recommended. The performance guide is included as an appendix to the analytic body of the paper.