PCM通道数据采集，可以把Codec与DSP间的PCM数据流保存成一个文件，再用CoolEdit分析，从而得到Codec和DSP的增益信息和频率信息。-PCM channel data acquisition, Codec and DSP can be among the PCM data stream into a file save, and then CoolEdit analysis, thus Codec and DSP gain information and frequency i