If you consider music is her future major, you should continue. Otherwise, should not continue because
1. you have enough plates (you only need 2~3) to fill in the application form. You have 3 or 30 plates that's no big different.
2. If you have epa > 4.5 and SAT closed to full that you can continue
3. Manage time for something else
My daughter has exact same situation, I will ask her to stop.