In 137 years, NYC’s The Metropolitan Opera has played host to many firsts. And yet, only with their new opera production, Thomas Adès’ “The Exterminating Angel,” has the venue heard an A above high note. Soprano Audrey Luna delivers the masterful moment, which most likely will go unnoticed by many. As the New York Times points out, “a high A—a combination of genetic gifts, rigorous training and psychological discipline over two fragile vocal cords—is monumental.” It’s beyond rare and demanding. Adès’ opera, an adaptation of the 1962 Luis Buñuel film, runs through 21 November. You can read more at the Times.