 Terre Thaemlitz's "Soil" and "Tranquilizer" releases in the early and mid-1990s served to introduce a "political" form of ambient music, continued in later releases such as "Couture Cosmetique" and "Means from an End", which aim to recast the usually passive artist-listener-environment equation.Thaemlitz's colleagues in the political ambient music front include the sound activist group Ultra-red.Following their remixes of Thaemlitz's "Still Life with Numerical Analysis" in 1998, Ultra-red joined Thaemlitz on the German label Mille Plateaux for their first two albums