巴特沃斯低通滤波器的MFC程序，FS是采样频率，fp是截止频率，大家-Butterworth low-pass filter MFC process, FS is the sampling frequency, fp is the cut-off frequency, we take a look at

内有，正余弦产生，幅度，频度设置，抽样，DFT,数字滤波器设计，提取黑白图片中的曲线-There are cosine generation, amplitude, frequency settings, sampling, DFT, digital filter design, extracted a black-and-white picture of the curve