Norwegian black metallers SATYRICON will perform with the Norwegian National Opera Chorus on September 8 at Den Norske Opera & Ballett in Oslo, Norway. A press release states: "Mixing musical modes of expression is always interesting. New sound pictures emerge, and when they are successful, new directions in style and genre are created. "What would a mix of heavy metal rockers and singers with operatic training produce? Let's find out! When the internationally renowned heavy metal group SATYRICON mix with the voluminous voices of theNorwegian National Opera Chorus, we can expect some thrilling surprises with two such powerful and monumental sound sources and widely divergent modes of expression come together as one.