Circulation ventilation method is a kind of cucurbit flute and bawu playing technique, that is, in the process of cucurbit flute and bawu playing, the nose is inhaled synchronously, so as to achieve the effect of continuous airflow and non-stop performance. This technique can be used on several wind instruments such as flute and suona in my country. The technique of circulating ventilation is also used in the cucurbit flute and Bau's solos such as "Pushing the Pendulum", "Pastoral Songs" and "Ancient Songs".

It is difficult to master circulatory ventilation. In a sense, it goes against the physiological habit of human beings, that is, breathing and breathing are carried out at the same time. If we want to solve the contradiction between breathing and breathing, we must find a way from the mouth, because A small amount of gas can be stored in the human oral cavity. Circulating ventilation is to slowly squeeze out the stored gas in the oral cavity through the method of muscle contraction inside the oral cavity. The air is blown out, and the cycle can be repeated, continuously.

You don't have to start training on the cucurbit silk, but insert a small tube into a container of water, hold the tube in your mouth, and blow air into it. The blisters are continuous, even when the nose inhales, the bubbling does not stop, so repeat the practice of blowing through the mouth and inhaling through the nose until the bubbling in the water can be easily achieved during ventilation, and then practice on the cucurbita .

When practicing on cucurbit. First of all, you can practice on the bass 3 (when the drum tone is 5), because it takes less air to play the bass 3, and then you will practice on the alto 6 after playing on the bass 3.