一个音频播放同时显示波形的代码，可以学习傅里叶变换过程，通过处理音频数据，整个程序以类的形式进行封装-An audio playback simultaneously display code waveform can learn Fourier transform process, by processing audio data, the entire program in the form of class encapsulates

音频信号通过LM386放大，IDW距离反比加权方法，进行波形数据分析。- LM386 audio signal amplification, IDW inverse distance weighting method, Waveform data analysis.