The music of Saint-Preux is universal and timeless, combining classical, popular, and contemporary musical trends. He enjoys worldwide sales of more than thirty millions records. In August 1969, at age 19, Saint-Preux took part in the festival of Sopot in Poland. On that occasion, he conducted a symphonic orchestra which performed his first large scale composition, La valse de l'enfance. He was awarded the International Press Prize of the Festival.