Liquid Tension Experiment (LTE) is an instrumental progressive rock/metal band, founded by Dream Theater's former drummer Mike Portnoy in 1997. The band has released two albums through Magna Carta Records. A third album, with the absence of John Petrucci, along with a fourth album, with the absence of Jordan Rudess (mostly), were released in 2007 & 2009 respectively, both under the name "Liquid Trio Experiment".