To the casual observer, Rock Island Sound appears to be a small, local store quietly selling, renting, and repairing guitars. For those in the know, it is so much more. Located across the street from the Rye Marina, around the corner from Milton School, and nestled in between Scissors on the Sound and Pilates Studio of Rye, Rock Island has drawn a large collection of amateur, professional, and student musicians. Packed into a tiny storefront are four practice spaces, retail i