Beatrice Rana, known for ferocious technique and musical intelligence, presents a program on laughter and lessons from the “City of Lights.” In her delightful La Jolla Music Society program, Rana explores the city where Chopin, Debussy, and Stravinsky all lived, loved, and created. My pre-concert lecture considers how Paris offered the perfect milieu for these composers and works: The idiosyncratic humor of Chopin’s Scherzos. The serious business of Debussy’s formidable Études. And the Russian traditions and modernist innovations of Stravinsky’s Petrushka.