What is "erkencho"

The erkencho is a folk clarinet of the northern region of the Gran Chaco of South America, particularly northwestern Argentina. It consists of a tube 10–13 inches (25–33 cm) long, with a single reed and a cow or goat horn attached at the end, as a hornpipe. Some writers consider the erkencho to be a smaller variant of the erke, with the name erkencho being a diminutive thereof.