Ever wonder what a night of serious drugging with Ulysses S. Grant and Oliver Cromwell might sound like? Or, more to the point, what on Earth inspired Matmos to make an album centered loosely-very loosely-around the American Civil War and the English Civil War? Likely as not, the celebrated San Francisco-based electronics n' more duo just wanted a good excuse to hop into the time tub with a cast of friends-ranging from laptop giant Keith Fullerton Whitman to Chicago renaissance soundmaker David Grubbs-and whip up a heady, post-IDM froth. Sure, the album abounds with period touches: the charming banjo melody on "Reconstruction," and an utterly spasmodelic version of "The Stars and Stripes Forever," f'rinstance. Buts it's when they drop the time-travel schtick, as on the relentlessly string-driven grinder "The Struggle Against Unreality," that Matmos seem most at peace with themselves.