[cshimmin]

This is noted in the article, "A direct causal link between musical training and general cognitive faculties, however, seems unlikely."

The point of the article is that they've found a specific neurological relationship between two types of working memory:

"The results show that if musical training influences visual working memory, then it does so via the “detour” of musical working memory. In other words, by way of its primary benefits for musical working memory, musical training could have a positive effect on visual working memory as well."