The Stop Key
The stop key has one simple function to perform - to stop the chanter playing. It is primarily used when tuning drones, and sometimes regulators. When performing these tasks, it is often useful to hear them in isolation and this is where the stop key is very useful. Chanters without this key need to be "choked" to stop, which is done by twisting the neck of the bag to constrict the airflow to the chanter reed. Once you have one of these keys, you never want to be without one.