Instrumental Rock/Metal group from Philadelphia, PA, USA.
Current line-up: Kevin Hufnagel - Guitar, Colin Marston - Bass, Jeff Eber - Drums
Ex-member: Clayton Ingerson - Bass

1998 - Kevin Hufnagel calls Clayton Ingerson...says he has some riffs he wants to show him. A few riffs turn into 5 or 6 songs. We begin auditioning drummers to no success.
1999 - Dysrhythmia is born. Drummer Jeff Eber is found through a psychic dream. We play our first show ever, in Philadelphia, PA, at the legendary Stalag 13 with Discordance Axis, and Ruins. Purchase a used van for $1,000 and begin to think about touring.
2000 - Our first record Contradiction is released. Recorded on 16 track analog reel-to-reel in a basement in South Jersey over two weekends. Embark on our first DIY tour. Continue playing to the same 5 people in Philadelphia.
2001- Record album number two, No Interference. Tour with the infamous Overlords of the Underworld. Release a split 10 with misunderstood musical outcasts, xthoughtstreamsx. Continue playing to the same 5 people in Philadelphia.
2002 - Record a split 7 with Technician, complete with a sheet lead cover and rubber gloves stuffed inside for the consumer's protection. Tour our asses off. Attract the attention of Relapse Records. Sign to Relapse.
2003 - Record album number three, Pretest, with Steve Albini at Electrical Audio Studio B in Chicago, IL. Tour, tour, tour. This time with the likes of labelmates Mastodon, Cephalic Carnage, Burnt by the Sun, and more.
2004 - Continue touring in support of Pretest, doing dates with Clutch, Mastodon, High on Fire, Zeke and others along the way. New material begins to develop yet bassist Clayton Ingerson eventually leaves the band. Colin Marston enters. Dysrhythmia continue on, writing and now rehearsing in Brooklyn at Colin's studio while Kevin makes trips up from Philadelphia and Jeff down from Boston. All for the love of the instrumental rock. Live from the Relapse Contamination Festival 2003 CD is release in a limited edition of 1, 000 copies.
2005 - Writing for record number four continues. New van is purchased. Spring tour with Jucifer. Spend summer demoing the next record. Band relocates to Brooklyn permanently. Translation Loss Records re-issues No Interference with additional bonus tracks. Fall tour. Record our fourth studio album Barriers and Passages with Martin Bisi at BC Studios, set for a Spring '06 release.
2006 - Barriers and Passages is released in May. Tour throughout the Summer with bands: Behold... the Arctopus, Yakuza, and The Dillinger Escape Plan. Begin writing new material.
2007 - Spring tour with Pysopus, and Behold... the Arctopus. Spend the summer writing for the next record. Release a split EP called Fractures with UK-based ambient/drone sculptors Rothko in late August.
2008 - Summer tour and completion of writing for 'Psychic Maps'
2009 - 'Psychic Maps' is released, a Fall tour follows. The band is now on their third van.