The overtone flute is an old instrument that has influenced the folk music in many places by its special sound and scale.
In order to make it easy for beginners, the flute should be played with a covered half-tone hole, so that just one hand movement is necessary. (This is also the shape in which the flute is delivered.)
You can regulate the tone height in two different ways. The first possibility – which gave name to the flute, – is to vary the blowing intensity in a weak or strong manner. If you blow softly, you will receive a very low tone which is the fundamental tone of the flute. When you blow more intensively, higher tones will spring up in the rising scale and a so called overtone or natural tone scale will result.