在matlab中设计不同阶数的FIR滤波器,并对音频文件进行读入，分别对左声道和右声道进行滤波，分别满足35阶FIR滤波器和315阶FIR滤波器，输出音频文件，并进行滤波效果的对比。(In the MATLAB, FIR filters with different orders are designed, and the audio files are read in. The left and right channels are filtered respectively, which satisfy the 35 order FIR filter and the 315 order FIR filter, and output the audio files, and compare the filtering results.)