This evening is being billed as “Free Improvised Noise Music,” which should spell things out clearly enough for those hoping to hear a few Sonic Youth classics played the way they were recorded: probably not gonna happen. Moore and Toop have worked together numerous times over the years as part of the U.K.-based Alterations, though they rarely perform together in duo form in the States. As is generally the case with improvised noise music, don’t expect a standard verse-bridge-chorus song structure. These guys will go out of their way to create the wildest sounds imaginable. If your mind is totally open, if you enjoy the more extreme forms of jazz, then there’s plenty to get your teeth into. It’s not for everyone, though.