abstract: Examples of new or extended clarinet techniques first appeared early in the twentieth century. By the 1960s, composers and performers began to drastically augment standard clarinet technique, by experimenting with multiphonics and microtones. Subsequently, clarinetists-teachers William O. Smith, Gerard Errante, Ronald Caravan, and others further pushed the limits of sound through their compositions for clarinet. This study explores the important contributions of clarinetist-teacher-composer Eric Mandat to the clarinet repertoire, and presents readers with a detailed biography of Mandat. Additionally, this research paper provides insights into Eric Mandat's instinctive approach to life and considers how this modus operandi translates into success as a composer, as a clarinetist, and as a teacher. Interviews with Eric Mandat comprise the basis for this document; these are supplemented by his writings, articles about Mandat, reviews of his music, and interviews with select colleagues and students. This is the first document to examine Eric Mandat's history and development as a composer, teacher and clarinetist. / Dissertation/Thesis / D.M.A. Music 2012