Prelude viola strings are manufactured using a solid steel core. Unaffected by temperature and humidity changes, they have excellent bow response. Prelude strings have the warmest sound available in an affordable, solid steel core string design. Prelude is one of the educator’s preferred choices for student strings due to their unique blend of warm tone, durability, and value. D’Addario Prelude viola string sets are designed, engineered, and manufactured in the USA.