Ditte Andersson plays the nyckelharpa.
The nyckelharpa is a string instrument . With a short bow to their strings in vibration offset. The pitch of the melody string (s) is driven by the pressing of buttons, the "keys", determined - similar to the hurdy-gurdy . These buttons are also used as tangents described. There are many forms of nyckelharpa. A modern, chromatic nyckelharpa has four melody strings, which are played with the bow.