I think many beginners will encounter such a problem when they start practicing saxophone, that is, the muscles in the corners of their mouths will turn sour after playing according to the mouth shape specified by the teacher for a period of time. The specific performance is to keep a fixed standard mouth shape and practice for a period of time, and then the muscles of the chin will feel involuntarily pulled down, as if they can't control it, which forces some people to bite the flute head with their teeth. But even if you bite the flute head and force yourself to continue blowing, if you don't stick to it for a while, the whole mouth muscles will tremble, making it impossible to continue blowing. So what causes this and how to solve it? First, let's find out what the root cause is. Sour mouth muscles means that when a novice plays saxophone, the breath he gives is the strength of the mouth muscles, which will inevitably lead to sour mouth muscles after a period of time. The key to correct saxophone pronunciation is "breath sinking" What is "qi sinking"? In other words, the control of saxophone breath is not controlled by the mouth, but by the abdomen. This may be confusing for beginners. Let me give you a simple example. The most obvious difference between breathing with the mouth and breathing with the abdomen is that breathing with the mouth is blessed and breathing with the abdomen is harmonious. I believe many people understand this, but if you start with "Fu" and now correct it and send "He", you will find it difficult to make a sound, or even a little sound won't last for a while. Don't worry, this is a normal phenomenon, which is caused by the wrong mouth shape in the past. Practice slowly, and you will get used to it. After a certain period of correct mouth posture practice, you will find out what real mouth relaxation and throat relaxation are like. As long as you remember one thing and make sure there is nothing wrong, that is, when breathing, you should always think that the support point is not your mouth, but your waist and abdomen, and that's all.