函数可以作出时域波形图和频域频谱图，并且计算基因频率自动判断音频文件是男声还是女声声音。ds函数输入变量是文件名和降采样的间隔，通过插值的办法保证了原信号的长度，可以画出时域及频域图像，并且判断男女声，最后播放降采样之后的声音-The function can make time-domain waveform and frequency spectrum, and calculate the gene frequency automatically determine the audio file is male or female voice.Ds function of the input variable is interval file name and down sampling, by interpolation approach to ensure that the original signal length, can draw the time domain and frequency domain of image and sound judgment, men and women, last played down after sampling the sound