ルイ・クープラン
The Baroque period saw a flourishing of harpsichord music. Influential composers included Jacques Champion de Chambonnières, Louis Couperin, Élisabeth Jacquet de La Guerre, François Couperin. Jean Philippe Rameau, a prominent opera composer, wrote an influential treatise on musical theory, especially in the subject of harmony; he also introduced the clarinet into his orchestras.