Andrea Rosin Vienna Viola Rosin Vienna (Viola Symphony) Developed by Andrea Bang (formulator of Tartini Rosin) as a next generation improvement, this rosin sets new standards of playability in all performance venues for violins and violas Andrea Bang Vienna Rosin for violin and violas sets a new standard of playability in all performance venues Andrea Bang Vienna Rosin for violin and violas sets a new standard of playability in all performance venues