发声与长音练习正确与否?牵涉到音色与日后音乐的表现。除了呼吸之外这是基本练习里最重要的一环,对一般学习者而言,发声就是由吹气而发出任何类型的声音。但是这里我们要说的是,不但要发声而且要立刻做出宏大的、宽厚的、优美的、透明的、外实内松的、集中的、有投射力的,并能徐徐收尾的正确的乐音（依不同乐器而有所不同）。绝大部分的人都说音色是天生的,但事实上音色不是天生的,而是可以练出来的。非常简单,只要三分钟,就可练成。而长 Sound and long sound practice correct or not? Involved in tone and future music performance. In addition to breathing this is the most important part of the basic exercise, for the average learner, the sound is made by the inflatable and make any type of sound. But here we are going to say that we should not only make a sound, but also immediately make the right, generous, graceful, transparent, external sounding, focused, projective, and ending sound (Varies depending on the instrument). Most people say that timbres are natural, but in fact timbres are not born but can be practiced. Very simple, as long as three minutes, you can practice. And long