terzetto
Terzetto is a musical composition for three performers or three voices. The term originates from the Italian word for "trio." In classical music, a terzetto typically refers to a work written for three solo instruments or three voices. While the term "trio" is more common, "terzetto" is sometimes used to distinguish a composition for three parts from a trio sonata, which might involve more instruments but feature three independent melodic lines.
Historically, terzetti have appeared in various forms. In opera, a terzetto is a scene or aria written