Jinghu without volume, whether there is one of the five major factors.

1. The bamboo material should be old and hard, with strong rigidity and shock resistance, and the diameter at the 1000-pound point should not be less than 20MM. The diameter is small, the sound is not raised.

Common diseases are: the burden is bent by the tension of the strings; whether the burden has cracks; the length of the burden is not enough.

2. It is better to use dead bamboo for the piano tube. It is characterized by being dry, light and brittle, with a strong resonance effect.

Common diseases are: the wall of the piano tube is too thick; the gardening process of the piano tube has a resurgence, which has changed the tension and unevenness.

3. The resonant structure and structure of Jinghu should be integrated. Badly constructed sound.

The common problem is: the center line of the zither and the center line of the piano do not maintain the required angle difference. That is, the eyes on the piano are not open accurately.

4. The method of Mengqin should adopt advanced moulding. To ensure that the balance of Mongolia tension is just enough to have a good sound.

The common problem is that the original craftsmanship of hand-binding with wire cannot ensure the balance of the tension. It has a low success rate.

5, the scientific debugging technology can not be less. When you learn to play the piano, you must learn to debug at the same time.

Common diseases are: debugging is not in place. Any piano has to be carefully tuned to find its best tone choice.