Gemshorn

Type: Wind
Origin: Unknown; most references are from 15th century Europe
In Redwall: N/A
Appearance: The gemshorn is commonly made from the horn of a chamois or ox, though it's likely that it could be made from some other sort of horn.  It has a sweet, haunting sound somewhere between that of a recorder and ocarina.  The gemshorn is technically a flute, and the only flute in the Middle Ages to have a sharply tapering conical bore.
Use: Shepherds probably used the gemshorn to calm their livestock.  Be careful not to confuse the gemshorn with the organ stop of the same name.  This flute has a range of one octave.
Listen to the Gemshorn
For More Information:
The Gemshorn
How to Make a Gemshorn