Asmodeus X is an American electro-industrial band whose music is frequently characterized as a mixture of EBM and darkwave and typically includes the use of environmental sampling.

Fredric (Paul McAtee) and Marshal were originally members of a Goth band called, “Morphine Angel”, formed in Lincoln, Nebraska in 1993, and later based in Chicago, Illinois.

[8] During this time, part of Fredric's musical training came from work with Thomas Thorn, lead vocalist for the industrial metal band Electric Hellfire Club, contributing vocals for EHC's song "Pack 44".

[11] Their song "Age of Man" was included in the soundtrack to the independent film, Shut Eye, alongside other popular goth-oriented electro bands such as In Strict Confidence.

[19] The album showed off a key element that defines the band's sound—rich programming with extensive use of environmental sound samples and “darkened neo-classical noise-scapes”.

[20][21] The lyrics of the band's music are generally described as thoughtful or intellectual; meditations on “the darkest realms of the animal mind and the human condition” with "Goetic, Objectivist and left-hand path elements".

With Next-Gen Records in 2008, they released the two-disc style collection The Greater Key – primarily a compilation of remixes of music from the band’s prior two albums by prominent genre DJs and groups, such as Australian band Masquerade, Weltklang, The Evolutionaries (who contributed to the Xbox 360 Dead Rising soundtrack) and members of Written in Ashes, Provision and Bozo Porno Circus.

[33] In 2004, Asmodeus X played the role of the Tommy Gnosis band in a Houston stage production of Hedwig and the Angry Inch, performing "Wicked Little Town (Reprise)" with a lead vocalist from The Black Math Experiment, Jef With One F.[30] Later in 2006, they went on to remix a Black Math song, "Ruler of the Rock Robots (A Love Story)", which was retitled, "Ruler of the Trance Robots".

In 2006, he teamed with author and singer Alice Karlsdóttir and guest artists like Ian Read of the dark folk band Fire + Ice on a neo-folk project called Verdandi.

[35] Fredric also worked with Craig Ellenwood of Psychic TV on a 2011 music video, Fire Idol vs Asmodeus X -Coconut Disco (Asmodeian mix).