This week the extremely Anne Sofie von Otter cool visits the San Francisco Symphony to perform songs by Grieg and Sibelius. Sibelius' songs are achingly Romantic and deserve to be better known, but the concert promises more than that: Brahms' Serenade No. 1 is a wonderful piece that shows off the generously lyrical side of Brahms, without taking on the thorny, brainy issues of the symphonies. And as a brisk cocktail for this feast of Romantics, MTT will lead the Symphony in the no-nonsense, down-to-earth gaiety of Paul Hindemith's Concert Music for String Orchestra and Brass, written for the 50th anniversary of the Boston Symphony, in 1930.