Opus Two is an American violin and piano chamber music ensemble featuring violinist William Terwilliger and pianist Andrew Cooperstock.
[3][4] Terwilliger and Cooperstock have been performing together since 1993, when they won the United States Information Agency’s Artistic Ambassador Auditions, which resulted in a 30-concert tour of Latin America and the Caribbean where they presented music by American composers.
[6] Internationally they have performed throughout South America, Europe, Africa, Australia, and Asia with engagements across China, Korea, Japan, and the Russian Far East.
[8] Arrangements commissioned and premiered by Opus Two include:[9] Andrew Cooperstock is a professor of Piano at the University of Colorado, Boulder College of Music.
[citation needed] William Terwilliger is a professor of Violin at the University of South Carolina School of Music.