Biosphere is the main recording name of Geir Jenssen, a Norwegian musician who has released a notable catalog of ambient electronic music. He is well known for his "ambient techno" and "arctic ambient" styles and his use of loops and peculiar samples from sci-fi sources. His 1997 album Substrata is generally seen as one of the all-time classic ambient albums. Deathprod is a pseudonym used by Norwegian artist Helge Sten. Sten began creating music under this name in 1991, and in 2004 a self-titled retrospective box set collecting most of his recorded work was released. Sten uses homemade electronics, old tape echo machines, ring modulators, filters, theremins, samplers, and other devices to craft his sound. Jenssen and Sten previously collaborated on Nordheim Transformed (RCD 2005CD), a 1998 collection of reworked Arne Nordheim compositions. Stator is a split release, with three tracks by Jenssen and four by Sten. Mastered by Sten at Audio Virus Lab, Oslo. Commissioned by Tape to Zero.