Should DS take more SAT subject tests?

Thank you! He doesn’t intend to major solely in Music, which is why I didn’t post on the music forum. He is certainly capable of pursuing a major in performance and, to be honest, his father and I were surprised when he told us he didn’t want to solely focus on Music in college. He has applied to a few safeties, both public and private, and may end up applying ED II to one of the privates we have visited. So far, his top choices are Hamilton, Vassar and Skidmore. He’s also applied to Ithaca, Bates, Oberlin and Connecticut College, and some others we plan to visit. He is very aware that the Ivy League schools are a reach.