datripp, there really is no one answer to your question. If S is also academically talented, try looking at some of the schools that interest you and see what their policies are regarding both performance talent and academic merit aid.
For example Hartt/UHartford does NOT allow combination of a Hartt performance based scholarship in conjunction with a UHartford academic based award or grant. Been there, done that, but he did receive a substantial (and increasing) performance (strings) based scholarship.
Talent aid money is based on standing within the audition pool. The best candidates are offered the larger carrots. And "larger" is really a function of the specific school. Some are more generous than others.
Any school that will include/offer academic aid based on GPA, SAT/ACT, class rank in addition to a talent award might be a plus in your narrowing down choices. Info is usually detailed on the school's financial aid/scholarship webpages, but sometimes it pays to dig into the undergrad handbook as well.
Some schools are better at disseminating this info than others.
There is no "list" per se here. There may be some info here
Suggestions of Colleges with Music Majors
There's one thread here with a little bit of info.
Master List of Scholarships and Merit Aid
As a general rule, the straight conservatories will offer talent and need based aid only; I am not aware of any institutional academic awards for performance concentrations.