Frank-Martin Strauß, better known as F.M. Einheit and also known as Mufti, (born 18 December 1958, in Dortmund) is German musician and actor, known for his work in industrial and electronic.
While primarily known for his work with the influential group Einstürzende Neubauten as a percussionist using self-designed custom instruments, Strauß has also collaborated with KMFDM, Goethes Erben and recorded several albums in collaboration with other musicians (such as Diamanda Galás, Mona Mur, Andreas Ammer, Ulrike Haage) and solo. Einheit was also involved in the projects Stein and Gry.