程序运行就打开录音设备，同时输出其波形和经过FFT变化后的波形。-Program runs on the open recording equipment, while the output of its waveform and after changes in the waveform after FFT.

在录音过程中输出音频文件的波形,适合初学者学习-In the recording process of the output waveform audio files, suitable for beginners to learn