This fall I was part of a groundbreaking Soundstreams Canada production of Claude Vivier's Musik für das Ende and Glaubst du an die Unsterblichkeit der Seele. Check out this New York Times article highlighting the event. The production was under the great musical leadership of John Hess and directed by Chris Abraham.
https://www.nytimes.com/2017/10/29/arts/music/review-claude-vivier-canada.html