When Gershwin inquired of Ravel how much he charged for composition lessons, the Frenchman allegedly asked him how much he earned. The American’s answer prompted Ravel to wonder whether he should take lessons from Gershwin. Von Oeyen’s coupling of Ravel’s G major concerto with Gershwin’s rarish Second Rhapsody is welcome, particularly as it is preceded by a barnstorming account of Saint-Saëns’s No 2 in G minor.