Ad·ver·sary is an industrial music project fronted by Jairus Khan, based in Toronto, Ontario, Canada.

[1] In 2005, after working as a DJ, Khan released his first EP, Cyanotic vs Ad·ver·sary - Music For Jerks, as Ad·ver·sary.

[3] In 2008, Khan signed to the Tympanik Audio label to release his debut album as Ad·ver·sary, Bone Music,[4] which was also made available as a free download under Creative Commons licensing.

The album was mastered by Yann Faussurier of Iszoloscope, containing remixes by Antigen Shift, Tonikom, and Synapscape.

Khan performed at the 2012 Kinetik Festival, ending his set by screening a video, We Deserve Better, which criticized headlining acts Combichrist and Nachtmahr and the industrial music genre in general,[10][11] and, according to the website IdieYoudie, "openly critiques ... the use of misogynist and racist tropes in those bands' music and publicity materials".