During the last decade Stephan's music has been released on over 40 vinyl records and CDs, both solo and in collaboration with Akira Rabelais, Taylor Deupree, Robert Hampson, Sylvain Chauveau, David Sylvian and others on electronic music labels worldwide.
Between 2000 and 2005 Mathieu has taught Digital Arts and Theory at the HBKSaar University of Art and Design in Saarbrücken and as a guest lecturer at the Royal Academy of Arts in Göteborg, the Bauhaus University Weimar and the Merz-Akademie in Stuttgart.