Your favorite chamber orchestra ends the season on the lighter side, with music designed to tickle your classical funny bone. Peter Schickele and his hilarious alter ego P.D.Q. Bach (the last and oddest of J.S. Bach’s 20-odd children) will be well represented—namely by P.D.Q.’s brilliant reworking of the first movement of Beethoven’s Fifth Symphony as a sportscast, featuring play-by-play announcers, a whistling referee, and a penalty box for errant horn players. Mozart and Haydn were notorious musical jokesters in their day, and Peter Heidrich’s witty “Happy Birthday” Variations sets a familiar tune in the styles of Bach, Brahms, and beyond.