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. During his stay in Poland he composed the Concerto pour une voix which soon was at the forefront of international charts.