Who is the American bass guitarist known for his work in a virtual death metal band featured in "Metalocalypse"?
Bryan Beller
Title: Dethklok
Passage: Dethklok is a virtual death metal band featured in the Adult Swim animated television series "Metalocalypse".
Title: Marcin Rygiel
Passage: Marcin "Martin" Rygiel, (born 30 April 1983 in Krosno, Poland), is a Polish musician, best known as the former bass guitarist of the technical death metal band Decapitated from 1997 to 2007, leaving several months before their hiatus.  He was also a member of the avant-garde metal/black metal band Lux Occulta from 1998 until their hiatus in 2002.  In June 2008, Rygiel toured with the death metal band Vader as a session musician.  In 2010, Rygiel joined California-based death metal band Annihilated as their bassist until 2013.  He was the bassist for the Egyptian-American death metal band Nader Sadek from 2014 to 2015.
Title: Bryan Beller
Passage: Bryan Beller (born May 6, 1971) is an American bass guitarist known for his work with Joe Satriani, The Aristocrats, Dethklok, Mike Keneally, Steve Vai, James LaBrie of Dream Theater and Dweezil Zappa.  He has been Joe Satriani's tour bassist for both the "Unstoppable Momentum" (2013–14) and "Shockwave" (2015–16) world tours in addition to featuring on the "Shockwave Supernova" record.  Beller is also the bassist/manager of the rock/fusion super-trio The Aristocrats (with Guthrie Govan on guitar and Marco Minnemann on drums).  The Aristocrats have released three studio albums, along with two live releases documenting the band’s world tours in support of their debut album "The Aristocrats" and sophomore album "Culture Clash".  Their most recent studio album "Tres Caballeros" is the focus of their current world tour, which began in the summer of 2015 and will extend through to late 2016.
Bryan Beller Dethklok