"Langsamer Satz" (1905) by Anton Webern. The Faust Quartet is: 1st Violin: Wojciech Garbowski 2nd Violin: Cordula Frick Viola: Ada Meinich Cello: Birgit Böhme The quartet is based in Cologne, Germany. They can be contacted through the website: http://www.faust-quartett.de/en/start.html