Violinist William Terwilliger and pianist Andrew Cooperstock are the award-winning duo, Opus Two. They will perform for the Albert Lea Civic Music Association at 7:30 p.m. Thursday in the Albert Lea High School auditorium. The duo specializes in American composers such as Copland and Schoenfield, but will also include classical works of Chopin and Beethoven. Admission is by season ticket only; for availability, call 889-6341.