LEDUC - M.Moyse De La Sonorite Art Et Technique Flute 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 exercises should give a means to the players to transform their sounds and obtain a different and better tone.