When talking about Philippe Gaubert (1879-1941), people tend to see him as a composer. However, he reached the climax of his musical career as a conductor. Even prior to that, Gaubert kicked start his musical career as a flutist. Besides that, his contributions to flute performing, flute teaching and composing, especially his creations of flute pieces are certainly not negligible.

This thesis aims to probe into Gaubert’s “Troisieme Sonate for Flute and Piano”, which he created for both flute and piano. The thesis includes five chapters. The first chapter is the introduction, which tells about the motives, goals, ambitions and methods, as well as the documentation. The second chapter is the composer’s biography. Descriptions of the composer’s success in three aspects are described. The third and fourth chapters are the theory and practice of this piece. These two chapters include the analysis of the piece and the interpretation of it.