在讲线以前,必须介绍音频范围内信号的传输方式,这是一个基本而又重要的问题,但并不复杂。对专业音响工作者而言,不管选择重点是倾向技术还是倾向艺术,在日后的工作中,迟早要碰到这类问题。 Before speaking the line, the way in which signals are transmitted in the audio range must be introduced. This is a basic but important issue, but it is not complicated. For professional audio workers, whether they choose to focus on technology or are inclined to art, sooner or later they will encounter such problems in their future work.