Tonight’s the last chance (this season, in Orchestra Hall) to hear Riccardo Muti and the Chicago Symphony Orchestra take on resident-composer and sometime-DJ Mason Bates’s brand-new, electro-infused symphony, Alternative Energy, which includes sounds from Fermilab and junked auto parts, and was the hot item at CSO concerts last week. Word at midafternoon was that seats are available; $20 senior and $15 student rush tickets go on sale at the box office at 5 PM, the concert’s at 7:30. Also on the program: Honegger and Franck.