"This kiss to the entire world!" was Friedrich Schiller's original sentiment, adapted by Ludwig van Beethoven in one of the most popular symphonic interludes ever, the "Ode to Joy"—a plea for peace and togetherness—that closes his Ninth Symphony. It's performed everywhere, all the time, especially by people who hum, and in Japan, where it's a holiday tradition stemming from a WWI POW camp. Tonight, the 74-minute Ninth—its length isrumored to be the reason the compact disc was invented—is the only thing on the program. A simple, Beethovenian night. (Benaroya Hall, 200 University St, seattlesymphony.org, 7 pm, $17-$81)