Published in 1934 and written by the French flautist and composer Marcel Moyse (1889-1984), De la Sonorité proposes a method to acquire a beautiful sonority on the flute. Created for the use of advanced flautists, the exercisesshould give a means to the players to transform their sounds and obtain a different and better tone. De la Sonorité is divided into five parts: 1. Timbre and homogeneity of tone in the 3 registers 2. Suppleness of tone (especiallyin the low register) 3. Attacking and slurring notes 4. Fullness of tone 5. Management of tone in interpretation. Considered as a maestro by some musicians, Marcel Moyse has composed many flute methods and exercise books such alsopublished by Alphonse Leduc, such as Gammes et Arpeges (1933), Exercices Journaliers (1922) and Mécanisme-Chromatisme (1927). His methods are widely used and recognised worldwide.