@tige_r do you have instrumental lessons? Have you done any music outside of school or summer programs? Do you consider yourself conservatory level (not necessarily suggesting conservatory)?
The music major forum has an essay entitled “The Double Degree Dilemma” in the Read Me section there. it discusses different ways to study music using hypothetical individuals.
You can do a double major or a double degree, or a major/minor, or do a BS in biology and do lessons and performance as extracurriculars. Many schools have vibrant music extracurricular departments. If you want to do biology, the easiest route is the latter.
If you don’t do a BM degree, it is sometimes wise to avoid schools that offer one because the best teachers and resources may go to the BM students. This is not always the case, though.
You could choose schools like Brown, Amherst, Hamilton that have open curricula and no gen eds, for more flexibility, but a BS will take up a lot of your classes so extracurrlcular music may work best.
Oberlin has a “Musical Studies” major that gives conservatory resources to non-majors. Double degrees are common there. Bard Conservatory students are required to do a double degree. I also know a student who majored in biology there for a BS but did a lot of music. Lawrence is a good place for double degree. Tufts and Vassar may be fits. Tufts has a double degree with NEC but also excellent extracurricular music.
You really have to look at each school in detail to satisfy both needs!