In the first half, the LA Phil’s Conductor Laureate reunites with one of his favorite collaborators, violinist Pekka Kuusisto, for the world premiere performance of a new concerto by another of Salonen’s regular collaborators: composer Gabriella Smith. Afterward, he guides Debussy’s radiant, Impressionistic cantata, La damoiselle élue, with soprano Liv Redpath, mezzo-soprano Fleur Barron, and the voices of the Los Angeles Master Chorale.