我自己编写的VB的FFT程序，算法中改进了网上常用算法的一些Bug，并且进行了优化，已经移植到DSP中检验过算法的速度与正确性，测试数据显示效果非常好。-myself prepared by the VB FFT procedure, the algorithm used the Internet to improve the algorithm Bug, and the optimization, which has been ported to the DSP algorithm tests

通过api函数获取声卡音频数据，并进行FFT变换，将频谱图显示出来。(Data sound card are obtained by api functions and converted with FFT to frequency graph.)