Mathias Grassow & Tomas Weiss

Mathias Grassow (9 May 1963 – 13 August 2025) was a German ambient musician whose recordings can also be classified in the genres of dark ambient and drone ambient. His music often has a meditative and emotional and spiritual context, which induces deep feelings of introspection in listeners. Over his long career, he collaborated extensively with other notable ambient composers such as Klaus Wiese, Oöphoi, Alio Die, and Tomas Weiss.