As a founding member of the legendary German avant-garde ensemble Can, Holger Czukay is widely recognized as a founding father of experimental rock & roll. After his acrimonious split from the band, Czukay swore he'd never play live again. But the sounds of jungle, techno, and trip-hop rekindled his interest in the club scene, so when Dr. Walker (of Air Liquide) invited Czukay to join him on-stage during an underground party in Cologne, Germany, he was ready. This impromptu duo performance led to a number of more formal engagements, three of which are partially documented on these two discs.