Feedback suppressor how to debug?

Feedback suppressor eliminates feedback whistling phenomenon, while maintaining a sufficient volume and good-quality methods and procedures. In conferences, performances, lectures, reports and many other occasions, good sound reinforcement systems are indispensable. 10. repeat 9 until all the LEDs of filter, and one in Flash, which indicates all fixed dynamic filter has been set up in the adjustment process Note: 1. the adjustment is complete, if you increase the system volume, the feedback will not be suppressed 2. clipping level of control to fit, too high may signal clipping or distortion, so the end of the letter Mania than low-or produce the "hissing" sound.