Tonight in Bonn, Georg Friedrich Haas’s Nocturno, for female choir and accordion, will have its first performance, as part of Theater Bonn’s Bonn Chance! series. In this work Haas again returns to the realm of total darkness, as in his Third Quartet; the chorus sings settings of Georg Trakl’s “Romanze zur Nacht” and excerpts from Novalis’s “Hymnen an die Nacht.” Nocturno will be presented alongside two previous Haas pieces, Atthis and Haiku, as part of an evening-length experience, with some intermediary material composed for the occasion. The Frauenchor of Theater Bonn is joined by members of Ensemble musikFabrik, who, rumor has it, may be journeying to New York with a major offering before long. In May, Haas’s new opera Thomas will have its premiere at the Schwetzinger SWR Festspiele. The libretto, by Händl Klaus, tells of a man watching his companion pass away on a hospital bed, with a nurse named Michael looking on. The Schwetzingen program, which is generally rather mouth-watering, also includes four portrait concerts centered on Haas’s work. The composer’s most famous creation, in vain, continues to move around the world; in November and December, it will arrive in the UK.