Louis Moyse, a flutist, composer and founder of the Marlboro Music School and Festival, died July 30 in Barre, Vt. He was 94 and lived in Montpelier, Vt. The cause was heart failure, his family said.

Finally, Moyse concludes, "Beautiful playing." Moyse is first and foremost a teacher of the French flute tradition. But within that tradition, he teaches expression through tone control. Like his ...