Helmut Lachenmann
Founded by composer and conductor Beat Furrer in 1985, it is run on collective principles, having no official principal conductor. Sylvain Cambreling is principal guest conductor. The group is often cited as Austria's leading contemporary music ensemble, and is particularly noted for its performances of music by composers of the German-speaking countries, including Helmut Lachenmann, Wolfgang Rihm, and Hans Zender.