Riccardo Muti leads the Chicago Symphony Orchestra in a concert of powerhouse orchestral works at Carnegie Hall. AJ Wilhelm for NPR Music hide caption

itoggle caption AJ Wilhelm for NPR Music

Composer John Luther Adams accepts enthusiastic applause from the Carnegie Hall audience after the New York premiere of his 2014 Pulitzer Prize-winning piece, Become Ocean, performed by the Seattle Symphony Orchestra. Melanie Burford/for NPR Music hide caption

itoggle caption Melanie Burford/for NPR Music

Reneé Fleming (right) and Susan Graham — two "cheerful Americans" often mistaken for each other — are planning an intimate evening of French song. Craig T. Mathew/Mathew Imaging hide caption

itoggle caption Craig T. Mathew/Mathew Imaging