中文说明：任选一首你喜爱的歌曲（最好歌曲可以通过菜单选择），采用已经学过的信号处理知识，设计高通、带通、低通、带阻几种滤波器，对其进行数字信号滤波，观察信号的变化； 通过扬声器播放处理过的信号，听信号有什么变化。
English Description：
Choose one of your favorite songs (best song through a menu selection), using signal processing knowledge that has designed high-pass, band-pass, low-pass and band-stop filters, to digital signal filtering, signal changes were observed; signal that plays through the speakers dealt with, listen to what changes signal.