音频数据的频谱分析.编程对一个wav文件（16位数据，单声道）的数据进行快速傅里叶变换，将变换后的实部和虚部数据输出至文件。-Spectral analysis of the audio data. Programming to a wav file (16 bit data, mono) data for a fast Fu Liye transform, the real and imaginary parts of the transformed data output to file.