Gemshorn is a musical instrument that has been in use since the Middle Ages. In simple terms, it is a horn that is made of a hollowed-out animal horn or tusk. It has a unique sound that can produce different tones, depending on the pitch. There are several synonyms for Gemshorn, including cornamuse, cornetto, and kortholt. Each of these instruments shares a similar history and structure with the Gemshorn. The Cornamuse is a Renaissance woodwind instrument that was popular in Europe during the 16th century. It has a conical bore and a capped double reed. The cornetto is a type of wind instrument that is made of wood or ivory and has finger holes. The kortholt has a similar structure to the Gemshorn, but it has a double reed and produces a more mellow sound.