It will depend on the school IMO, with music dual degree (and I would assume dual major) they will give more lattitude in academic admissions if someone is a music student as well as opposed to straight academics. So the same credentials that would not be accepted by Umich for an academic only student might very well be accepted by a student planning to study music or dual degree. My experience (and take it for what it is worth) that your D may have more trouble with the Ivy league schools you mention if her grades are not near perfect, if only because those schools get a ton of kids who are both musically accomplished and academically near perfect , so the competition may be greater there. On the other hand, if your D is coming in as a composition student, that may weigh in her favor at the Ivies in terms of wanting some diversity in the student body. In composition, winning those awards might help (and the composition parents can talk about that), it is a bit different than a BM degree where it is about the audition, where those competitions will mean little in terms of getting admitted.
My take? admissions is such a crapshoot in some ways that given your daughter’s stats, I don’t see any reason not to apply to the programs you mention, assuming by the time she applies she still wants to do those things. Given who she is and that her academics and test scores are relatively strong (using your descriptions), there is no magic number for any of those schools IME/IMO, and while it could be if she applied to Brown, Yale or Harvard strictly academically she might not get in, the combination of her background may well get her in there, same with many of the other schools. The admissions game is such that unless she was marginal with grades/ scores (for example, if she had a 3.0 with a relatively easy academic program and had a 1800 SAT hypothetically), she probably stands as good a chance of getting admitted given her background if she had near perfect stats, lot of kids with those perfect scores don’t get admitted to the elite schools, because the stats alone don’t equal admissions. I would say once she figures out where she might want to go, apply and see what happens.