Just want to repeat what I wrote above 
People will recommend schools known for music but I would caution you that you need to check whether non-BM students losee out with the presence of a BM program. Often the best teachers and resources will go to the BM students. Not always though. Check with the schools (like U Michigan, St. Olaf, Northwestern).
We were in a similar position, when my kid decided in summer 2020 against conservatory, and so we were left with schools with great academics and schools of music. Kid had similar high stats, and very strong music achievement.
Kidās first criteria was the specific teacher with whom they would study, then academics, location, and some Jewish presence on campus. That really narrowed the list for my kid. They threw in Harvard as an ED because they knew that the conductor and the symphony was amazing, and figured that they could possibly do NEC dual degree if they wanted it, could study with someone in Boston not at Harvard (which doesnāt have performance music majors). Got in, didnāt complete the rest of the pending apps, went there. Extraordinarily happy there, plays music all the time, doesnāt have time to study with anyone but still practices, plays, even went to and placed very high in a competition.
If your daughter wants to continue studying violin, but not be a full on music major in the school of music, she needs to look very carefully at the specific teacher with whom she would study, and her playing opportunities, because as compmom said, she could lose out compared to the āseriousā music students.
Harvard is possible for her, depending upon how good she is, with a great music supplement submitted. Their symphony is fantastic.
I know this thread is old so no one is likely to see it, but just a few comments based on our experience with ds24 so far. Northwestern makes it possible to get either a BM with an additional major in four years, or a dual degree BM/BA in five years, but only with certain other majors (journalism, e.g.). The dual degree requires admission to both schools, and thatās a hefty tuition to pay for an additional year (more than 90k). The school offers a BA, but there is no performance option: itās a classroom music major (musicology, etc.).
Wisconsin, Colorado, and Washington (all of which may be too big for her, and perhaps not as high of an academic caliber as her stats suggest) all offer BAs in music performance and have lots of double majors. I know for a fact that at Wisconsin, thereās no discrimination against BA students, and roughly half of music majors double major. At Colorado itās more like 30 %.
Finally, students at Schulich at McGill can earn a dual degree, which requires admission to Music and Arts, and it takes 5-6 years to complete both degrees. But the tuition is much more reasonable than American privates or most out-of-state publics. Itās certainly up to her academic standards, but may be bigger than sheās seeking.
Good luck! The application process is a real journey.
Northwestern makes it possible to get BM with an additional major outside of music in four years?
yes, if planned well. I know some current Bienen students who plan and likely can graduate with dual degree in 4 years with overloading and one summer quarter taking courses.
Dual degree or double major? Double major is possible in 4 years. Dual degree is much harder to achieve in 4 years, especially with a performance major as one of the degrees.
Dual degree, Bienen+Weinberg. Their plans look practical enough on paper. I know there have been students graduated and graduating summer2024 who will receive dual degrees but I donāt know them personally. Itās not common but possible.
Yes to double major with a BM in four years. They double-count lots of things: for example, music theory fulfills a math requirement. Plus students take 4 courses per quarter, so thatās 48 courses over four years, while most quarter-system schools only do 3 courses per quarter, so itās possible to pack in that second major in four years. Dual degree with Weinberg they bill as typically taking five years, but impressive that some students can pull it off in four.
Guessing some majors (like Economics) are lighter on requirements and easier to do than others.
The degree requirements are public information on the official websites of many universities. When my son applied last year, he did some research on the four programs he was most interested in and highly likely would get in. From the websites he drafted out what courses to take in which semester to fulfill the degree requirements. He also asked some friends who were already in those programs for their experiences. The overall conclusion was that in two universities, for him, with AP credits, it is possible (not certainly) to complete two degrees in four years; in another one it will take five years to work out two degrees; in another one he can get BM and a minor in the non-music field he likes in four years but not two degrees. Several of his friends did this research the year before so he learned from them.
I have had 3 of my former students go to Amherst College and absolutely loved it. One still there!! The horn teacher is great.