fxrapt

代码说明：

  这个函数提供了一种基音频率检测算法，具体的算法内容详见MATLAB文件的说明，有详细的注释，工程中已经应用过，有较好的应用价值(This function provides a pitch detection algorithm, the specific content of the algorithm see MATLAB documentation, detailed annotations, engineering has been applied, has good application value)