Kevin Shirley, also known as The Caveman, is a South African–born music producer, engineer and audio mixer for many artists, including Aerosmith, The Black Crowes, Silverchair, Journey, Iron Maiden, Led Zeppelin, Rush, Joe Bonamassa, Beth Hart, Dream Theater, Jimmy Barnes, Cold Chisel, Joanne Shaw Taylor, The Springbok Nude Girls, All Night Radio, Steve Louw & Big Sky, HIM, Mr. Big, and Europe. Wikipedia