This live recording of Wagner’s great opera Tristan und Isolde was recorded in August of 1958.; Wolfgang Windgassen, who champions the role of Tristan, was known for his powerful voice and successful performances in Wagner operas. He is often considered the most accomplished Wagner tenor of the twentieth century.; Swedish soprano Birgit Nilsson was also a Wagner specialist, along with works from Strauss. Her voice is remembered for its force and brilliance in the upper register.