<p>I was going to say that the math/music combo is popular at St Olaf (usually very bright, driven students), but BensenBurner beat me to it. Oh, St Olaf also has neuroscience. Lawrence might also work (conservatory and strong science).
In any case, you could officially major in math or neuroscience, and prepare a music major on the side :p. If your parents homeschooled you and wouldn’t pay for a music major, that may be a solution. Music engineering or music/cognition are other possibilities.
Go online and type “request information” or “join the mailing list” for all the colleges indicated so far. Good luck with your search!</p>