College admission officials will usually tell you that a student should pursue interests outside of academics and that it’s fine for an applicant to stick with band, even though it’s not a “weighted” class and so this choice will probably have a negative impact on GPA and class rank.
BUT … I’ve found that these admission folks often speak with forked tongues and don’t always practice what they preach. In other words, they are likely to be more impressed by the candidate with the higher rank and grades than they are with the student who marched with her flute or clarinet at graduation. While every admission official on the planet will tell you that band is a very worthwhile activity, there is certainly nothing unique or “sexy” about it that will jump off the page at decision time. Sure, plenty of band students are admitted to “elite” colleges every year, but, in your daughter’s particular case, it sounds like band isn’t the right choice.