Orchestras across North America have been mounting concerts featuring music from the Lord of the Rings movies, and others based on the scores composed for various fantasy-genre video games. Purists may hate such crossover dreck, but they don’t have to attend, and Andrew Adler says that there’s nothing inherently wrong with such middlebrow outreach, so long as orchestras aren’t fooling themselves into thinking that the sci-fi nerds and gaming geeks that turn out for such shows will be similarly tempted by a Mahler symphony.