Kronos Quartet performs "Beebopterismo," from Terry Riley's Sun Rings, which was commissioned in part by the NASA Art Program and includes plasma waves recorded from NASA spacecraft, including the Voyager 1 and 2 probes. The video, edited by Robert Edridge-Waks, features footage from Willie Williams' visual design for the staged multimedia production of the piece, which has been performed by Kronos nearly fifty times in eleven countries and eighteen states.