Jeroen Paul Thesseling

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Jeroen Paul Thesseling
Background information
Born April 13, 1971
Genres Microtonal music
Contemporary classical
Death metal
Instruments Bass guitar
Years active 1991-Present
Associated acts Salazh
Notable instruments
Warwick basses

Jeroen Paul Thesseling is a Dutch fretless bass player, most famous for his work in the Dutch band Pestilence and German band Obscura.[1][2]


Thesseling began studying bass in 1988 at the ArtEZ School of Music in Enschede, Netherlands. During the period 1992-1994, he was a member of Pestilence, with whom he recorded the jazz/fusion-influenced album Spheres. In 1995 Thesseling started to study microtonality, which resulted in two pieces: Hafnium — study in 72-tone equal temperament (1999) — and Argon — study in 18-tone equal temperament (2000). The period following, microtonal and contemporary classical music inspired him to focus primarily on fretless bass. In 2005 he recorded with the studio ensemble Salazh. Between 2007-2011, he collaborated with Obscura and recorded with them on their albums Cosmogenesis (2009) and Omnivium (2011). During the period 2009-2012 he rejoined Pestilence after a 15-year break and recorded their sixth studio album Doctrine (2011). From 2012 to present he has participated in several recording projects, pushing fretless bass guitar in an unconventional role within contemporary music.


Jeroen is endorsed by Warwick and plays 6-string Thumb neck-through basses since 1993. From 2011 he uses 7-string fretless Thumb NT basses with a low F#-tuning.

Discography (selected)[edit]

Solo pieces
  • Hafnium (1999)
  • Argon (2000)
  • Discrepantium (2013)


  1. ^ Rivadavia, Eduardo. "Obscura". AllMusic. Retrieved 2011-12-15. 
  2. ^ Serba, John (2002-07-22). "Pestilence". AllMusic. Retrieved 2011-12-15. 

External links[edit]