实现语音的采集和回放，先将语音信号数字化再存储在ROM中，最后从读出、数模转换、滤波得到模拟语音信号!-achieve Audio Capture and Playback, the first digital voice signal then stored in ROM, the read out from the final, digital-to-analog converter, filter was simulated voice signals.

利用定时器触发ADC采集语音信号，存储到FLASH中，读回后用SPWM输出，经过低通滤波后可以还原出原始信号波形，效果还不错-Use a timer to trigger the ADC capture the voice signal stored in the FLASH, read back with SPWM output after low-pass filtering can restore the original signal waveform, the results were