录制一段个人自己的语音信号。对录制的信号进行采样；画出采样后语音信号的时域波形和频谱图；对语音信号进行加噪和去噪处理，画出滤波后信号的时域波形和频谱，并对滤波前后的信号进行对比，分析信号的变化；回放语音信号；实现快录慢放、慢录快放等功能。-Record a person' s own voice signal. Of the recorded signal sampling draw sample after the speec

创建和播放声音的类，class CMPSound，在其他单元添加#include "MPSound.h",就可以使用-SoundClass

This procedure to achieve sound noise, to achieve the effect of encryption, after denoising to get the original sound signal, and display the waveform.