Richard Strauss’s comic opera Der Rosenkavalier centers on how youth and age do, or do not, mix in the arena of love. It was a sensation at the time of its premiere, and tonight the Cleveland Orchestra will perform a Suite (compiled by music director Franz Welser-Möst) filled with the opera’s "delectable waltzes and passages of ravishing beauty." The other piece on tonight's program, Walker’s Lilacs, is based on Walt Whitman's poem “When Lilacs Last in the Dooryard Bloom'd.” The concert begins at 7:30 at the Mandel Concert Hall, where concerts also take place tomorrow and Saturday. Check the orchestra website for more info.