This week offers the fall season's first full-on train wreck of overlapping events. On Wednesday, the august London Symphony plays Beethoven's Ninth while Peter Serkin gives an enticing Takemitsu and Bach recital at Zankel Hall. On Thursday, Red Light New Music plays two shows at The Stone, with premieres by Daniel Vezza, Christopher Cerrone, A. Vincent Raikhel, and Scott Wollschleger (whose older piece The Cold Heaven I liked), together with Grisey's Vortex Temporum. Ear to the Earth, a festival of eco-conscious environmental sound, continues all week; on Friday you can hear the Princeton Laptop Orchestra and several young electronic composers at 3LD (notably Anna Clyne, who was the standout of last May's Underwood New Music Reading Sessions), and on Friday and Saturday you will have various chances to hear Suspended Sounds, in which the songs of extinct and endangered birds are manipulated by the likes of Morton Subotnick, Joan La Barbara, Joel Chadabe, and Alvin Curran. Also on Friday is a fascinating-looking program by the ACO, with works by Michael Gandolfi, Susie Ibarra, Michael Gatonska, Brad Lubman, Evan Ziporyn, and "composer on the edge" Corey Dargel. The LSO Beethoven cycle wraps up the same night. On Saturday, the Ensemble Dissonanzen presents works inspired by the sculptor Lucio Fontana at the Guggenheim (including, of course, John Cage's Fontana Mix), while Matmos and So Percussion play a Steve Reich-inflected program at Symphony Space. Sunday brings a Reichathon at the Whitney (free with musuem admission; there will also be a live webcast) and the premiere of Elliott Carter's new Wallace Stevens cycle by the Met Chamber Ensemble. Okay?