This is your last chance to see Ludovic Morlot conducting live onstage at Benaroya Hall, at least in his capacity as Seattle Symphony's music director. Couldn't ask for better exit music, though. As a French conductor whose intellectual/artistic lineage traces back to Debussy, Morlot is the only person I ever want to hear painting with the watery colors of the French composer's Nocturnes. The evening also features a composition from Leoš Janáček called The Eternal Gospel. The dramatic piece is shot through with golden moments of pastoral tranquility. The Northwest Boychoir will join the Seattle Symphony and the Seattle Symphony Chorale onstage for different parts of the party. by Rich Smith