👉 A returner is a type of musical instrument that produces sound by rotating a cylinder or pipe around its own axis. They are often used in orchestral, chamber, and electric compositions as well as in various forms of electronic music. Returners can be classified based on their size and shape, such as small, medium, or large. The most common type is the small returner, which typically has a diameter between 12 to 30 inches (30-64 cm)