My S played up the leadership component of his marching band and overall music experience in HS. He was section leader, quartermaster, and squad leader for the band. Additionally, he played in the local youth orchestra and was president of it his senior year (also played in both levels of jazz band, brass ensemble, and basically anywhere the HS music department asked him to.) I think all this translated well on his apps, even though he didn’t plan to major in music–and this son of two Michigan persons was offered a half-tuition scholarship to UMich (bah humbug on that other band, lol.)