说明：  这是用实施镶边效果这是一个分数延迟线，作为构建块。基本上镶边效果延迟实现不同时间acording一个低频控制信号。
(This is the implementation of the flanger effect is a fraction of the delay line, as building blocks. Basically, the flanger effect delay to different time acording to a low-frequency control signal.)