Yes, it can certainly help at some schools. Even if the music department doesn’t get “picks” like coaches do, they can vouch for your ability and the contribution you’d make and encourage admissions to consult you.
It’s important though that you are accomplished. If your accomplishment is playing with an excellent ensemble, that’s less exciting.
Reaching out can also be a good way for you to learn more about the music program, which I assume you want to continue with at BS.