John Adams was studying the score of Schoenberg’s Kammersymphonie while his seven-year-old son was watching old cartoons in the next room when he had the idea for his own Chamber Symphony: “The hyperactive, insistently aggressive and acrobatic scores for the cartoons mixed in my head with the Schoenberg music, itself hyperactive, acrobatic and not a little aggressive, and I realized suddenly how much these two traditions had in common.” Conducted by Thomas Guggeis, the Boulez Ensemble performs the two works side by side. Brahms’s sumptuously Romantic Piano Quintet opens the program.