Make room for a new generation of powerhouse artists when the “ferociously committed and incisive” Jonathon Heyward (The Guardian) conducts scores by two rising stars in their twenties. The British composer Grace-Evangeline Mason takes us on an ethereal adventure, and the American virtuoso Xavier Foley uses every measure of his creativity and charisma to make the overlooked double bass a conduit for joy and justice. Tchaikovsky’s passionate Symphony No. 6 closes the program.