This is the Japanese version of De la Sonorité , a book published in 1934 and written by the French flautist and composer Marcel Moyse (1889-1984), proposing a method to acquire a beautiful sonority on the Flute. Created for the use of advanced flautists, the exercises should 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 (especially in 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 composedmany Flute methods and exercise books also published by Alphonse Leduc, such as Gammes et Arpeges (1933), Exercices Journaliers (1922) and Mécanisme-Chromatisme (1927). His methods are widely used and recognised worldwide.