The Stranger has spilled a lot of glowing ink—deservedly so—on Fuck Buttons; the British duo are reliable creators of expansive techno-noise-drone. But it's advisable to arrive early for this show in order to catch White Rainbow (Portland guitarist/ keyboardist Adam Forkner). Updating Terry Riley's transcendental minimalism, White Rainbow finesses his voice and instrumental emissions into concentric ripples of tranquility, as if they're some beneficent form of radiation. He gives chants a peace. (Chop Suey, 1325 E Madison St, 324-8005. 8 pm, $12 adv/ $15 DOS, 21+.)