Come and watch Louis Langrée conduct four French masterpieces. Debussy’s Prelude to the Afternoon of a Faun features sounds from the sinuous flute introduction to the final languorous chords. Nocturnes’s vivid images of clouds, festivals, and seductive siren songs enchant. Met Opera star Isabel Leonard (Marnie) sings Ravel’s exotic song cycle Shéhérazade and Scriabin’s sensuous tone poem ends in ecstasy.