Sonancia
Sonanica is an ongoing research project to procedurally generate levels and soundscapes for horror games.
Phil Lopes, Antonios Liapis, and Georgios N. Yannakakis have been gradually expanding its capabilities, creating a system with the ability to frame tension with an input curve and create a scary soundscape for the generated level.
There’s a playable demo of their output so far, and you can help them with their horror sound research.