There are two artists using this name: 1) Dysrhythmia is an American instrumental progressive metal band formed in Philadelphia, Pennsylvania in 1998. The band's music combines avant-garde elements of progressive rock and jazz with heavy metal. They are currently located in Brooklyn, New York. Their most recent release, Psychic Maps, was released in July 2009 via Relapse Records. The band was formed in August 1998 by guitarist Kevin Hurnagel and bassist Clayton Ingerson, who were joined six months later by drummer Jeff Eber. The band entered the studio in early 2000 to record their debut album, Contradiction, which was recorded, like every other Dysrhythmia album to follow, completely live with minimal overdubs. Shortly thereafter, the band reentered the studio in 2001 to record the No Interference record. The new album helped to define and expand the band's sound, and was followed by extensive touring. In 2002, the band released two split albums, a 10" vinyl record with Thoughtstreams and a 7" split with Technician. The band signed to Relapse Records in October 2002. Entitled Pretest, their first album with Relapse was released May 13th, 2003 to positive critical acclaim. Metal Hammer Magazine named Pretest one of the Top 10 Essential Mathcore albums of all time, while Revolver Magazine ranked the album among the top 20 albums of 2003 alongside of records by Radiohead, Metallica and others. The band began touring with bigger named acts such as Mastodon, Cephalic Carnage and The Dillinger Escape Plan, and playing large music festivals including the 2003 and 2004 Relapse Contamination tour, the Relapse Records South by Southwest showcase in Austin, Texas, and the New England Metal and Hardcore festival, where the band was profiled by both MTV 2 and Fuse. Ingerson left the group in November 2004. To replace Ingerson, Dysrhytmia recruited Colin Marston, a member of the group Behold...The Arctopus (in which he plays a 12-string Raptor Warr guitar). Dysrhythmia next embarked on tours with Isis and These Arms Are Snakes. They recorded and released their fourth full-length album, Barriers and Passages, at B.C. Studios in Brooklyn with engineer Martin Bisi, who had previously worked with John Zorn and Sonic Youth. Barriers and Passages was released on May 2, 2004 in North America and May 9th internationally. The band continued touring throughout 2006 and 2007, and released a split album with Rothko in late 2007. Dysrhythmia stayed relat