A sort of instrumental prog-rock/prog-metal supergroup, Liquid Tension Experiment features Dream Theater's John Petrucci (guitar) and Mike Portnoy (drums), keyboardist Jordan Rudess (who has worked with the Dixie Dregs and has since joined Dream Theater), and bassist extraordinaire Tony Levin (King Crimson, Peter Gabriel, and many others). The group issued its self-titled debut in 1998 on the Magna Carta label and regrouped the following year for Liquid Tension Experiment 2.