In order to maintain the stability of the base pitch of the dulcimer, the dulcimer must be adjusted frequently. The dulcimer handle is generally octagonal, and can be inserted into the tuning shaft of the dulcimer in eight directions at a 45-degree angle. In order to achieve the best tuning action, generally when the piano handle is inserted into the tuning shaft, the piano handle can keep the direction from 3 o'clock to 6 o'clock with the axis, that is, within the lower right corner of the cross.

When using the piano handle, the first thing to do is to clamp the handle shaft hole on the tuning pin, try to insert the piano handle firmly, avoid excessive clearance, and avoid using the piano handle with the inner diameter of the teeth to hang shallowly. The inner diameter of the handle or the damage of the piano shaft caused by the tuning of the piano axis, so as to avoid the early baldness of the handle. Second, when changing the strings, the strings should be wound under the string holes in an orderly manner, which can avoid the premature loosening of the tuning pins and the inversion of the shaft.