The Munich Biennale for new music theater opens next week with Marko Nikodijević's Vivier, an opera based on the vibrant life and violent death of the French-Canadian composer Claude Vivier. Bob Gilmore's biography of Vivier arrives in June.... IRCAM's ManiFeste festival runs in June and July; Georges Aperghis's Luna Park is among the offerings.... The Birmingham Opera's production of Stockhausen's Mittwoch, in 2012, was an astonishing feat. It seems as though Graham Vick and his company have pulled off another tour-de-force, a Khovanshchina deftly retitled Khovanskygate; Fiona Maddocks reports.... In the Boston Globe, Colin Fleming has an informative piece about life on the church-music circuit.... The Flux Quartet's latest traversal of the Feldman Quartet (II), at the Park Avenue Armory, is available on demand from WQXR — all six hours.... Marina Harss, in The Nation, writes thoughtfully on dance at the Met, with particular attention to Prince Igor.... The Sonnambula viol consort plays Dowland's Lachrimae at Spectrum Saturday night.... Kristin Norderval has a solo event at the New Museum on Friday night.... The Argento Ensemble's next concerts at the Austrian Cultural Forum, on May 2 and 4, will feature world premieres by Erin Gee and Aaron Cassidy. Much more from the same adventurous group follows later in the month, on the theme of "emerging American composers and Viennese masters."