Oneirogen has been played on NTS in shows including Clara La San, featured first on 25 June 2015. Songs played include Vessel, Mutilation and Numina.

ONEIROGEN is the solo performance project of Mario Diaz de León, a musician based in NYC. His influences include underground metal, noise electronics, and modern composition. As of 2013, the project has three releases: the LPs Kiasma (2013), Hypnos (2012) and the EP Veni Nox Anima (2012), all on the Denovali label. De León also composes works in the modern classical genre under his given name. "Enter Houses Of" (2009), an album of his works written for ICE Ensemble, was released on Tzadik.