Yes, the date there is correct. Just found this video, courtesy of Doug Wellman of Puzzling Evidence: Superstars of sample People Like Us, Wobbly, and C. Elliot Friday (Don Joyce) of Negativland join forces with projectionists Wetgate to layer lightly at the Cell Space one fine spring night to discern “what’s music?”…
Over The Wobbly Wetgate People Like on April 9 1998 from Puzzling Evidence on Vimeo.