What is happening at the Philadelphia Orchestra? Peter Dobrin gives some essential background and context.... Early reactions to the world premiere of Stockhausen's Sonntag in Köln: Seth Colter Walls, Shirley Apthorp, Claus Spahn.... Harpa Concert Hall, the new home of the Iceland Symphony, opens in Reykjavík next month; the façade is by Olafur Eliasson, the acoustics by Artec. Not long ago the project seemed doomed to extinction on account of Iceland's economic collapse. Here's my 1995 review of the Icelanders at Carnegie Hall, with Osmo Vänskä conducting.... Kagel Nacht, a freewheeling theatrical celebration of the work of Mauricio Kagel, embarks on an East Coast tour this week.... The Urban Remix project has come to Times Square.... Tonight at St. Paul's Chapel at Columbia, the College of New Jersey Orchestra and Chorale will collaborate with Argento in presenting Mozart's Requiem together with Georg Friedrich Haas's Klangräume ("sound spaces"), which were written to tie together Mozart's original fragmentary score.... Andrew Rose of Pristine Audio has begun a remastering of Wilhelm Furtwängler's 1953 RAI recording of the Ring.... I'm very happy to have helped inspire Michael Century's forthcoming performance of Ann Southam's late-period masterpiece Simple Lines of Enquiry. It's at EMPAC, in Troy, NY, on April 25th.... The musicologist Alexander Silbiger has supervised an online thematic catalogue of the music of Girolamo Frescobaldi, whose pivotal role in the history of Western music is still not sufficiently appreciated. I'm presently delving into Tactus's monumental 12-CD box set of Frescobaldi's complete keyboard works.