<p>Oberlin actually has had a few hardy souls who have completed a dual degree in the Conservatory and the Physics department in five years. It is not easy, but not quite impossible either. In that program, however, you would very likely have to concentrate on just one musical area to be able to keep up with your classmates.</p>
<p>If you really want to get a degree in physics while dabbling around in several musical areas, you may not have the access you want to the really top-notch music faculty because their time will be taken up by the music majors. In some schools, your music lessons would be with grad students rather than faculty. That would be something that you would have to ask about at the individual schools.</p>
<p>Off the top of my head, you may wish to consider places like Princeton and Carnegie Mellon if your academics are in that lofty range. Princeton in particular has some excellent composition faculty, but you would still have to find out whether a physics major would be able to get into their classes these days.</p>