摘要：介绍一种基于8051F单片机的数字音频信号源，利用单片机用DDS算法产生音频信号，通过数字电阻衰减器控制音频信号幅度，在0~100dB的幅度范围内实现1dB的步进值，系统计算机接口实现了集中多路衰减量的控制。

关键词：音频；单片机；控制；数字/数字音频信号源；电阻衰减器；C8051F330；CD4053-Abstract: A microcomputer-based 8051F digital audio signal source using DDS algorithm for single-chip computer generated audio signals, digital resistor attenuator control of the audio signal amplitude, in the range of 0 ~ 100dB achieved within 1dB of step value, the system computer interface of the centralized multi-channel attenuation control.

Keywords: audio　microcomputer　control　digital/digital audio signal source　resistor attenuator　C8051F330　CD4053