Operating Instructions
Where To Put Your Ferret�
The Feedback Ferret can be used in a variety of locations within a sound system. Place a Ferret at the input insert of every microphone or you could process many microphones together by placing a single Ferret on the output of a vocal subgroup. One of the most common connections is to install the Ferret between the mixer�s output and the power amp�s input. This mixer output may be from the main output or the monitor output� depending on your needs. You can also place the Ferret on a single channel�s insert to eliminate feedback from a single microphone or instrument. Once the Ferret has determined the problem frequencies for a particular setup� you can save that group of filter settings to one of the four preset buttons for instant recall.
How Does It Work?
The Ferret includes a set of 16 digital notch filters that employ sophisticated algorithms that seek out and destroy feedback� without destroying your tone. There are two sets of filters on the Ferret� static and dynamic. Filters 9�16 are static and always set before the dynamic filters (1�8). Once these static filters are set� they lock and maintain their status until they are reset by the user or a different preset is selected. The dynamic filters (1�8) are those filters that change as your needs change. Any filter (static or dynamic) that is set� but not locked (as indicated by blinking filter LED)� will slowly release and return to flat (0 dB) and be available for further use. When the Ferret locates an offending frequency (feedback)� it applies a filter� starting with filter 16. This filter is centered at the feedback frequency and uses only as much attenuation as needed to remove the feedback. If feedback continues� the filter depth is progressively increased until the feedback is gone. If the feedback is momentary� such as a short squeal� the Ferret applies a filter but slowly releases it in .10 dB steps until it is returned to flat (0 dB). If the same frequency causes feedback again� the same filter will be reapplied. This process continues as additional filters are engaged� starting from the right side of the Ferret� until all feedback is gone. Monitoring continues as the Ferret attempts to release each active unlocked filter .10 dB at a time. Once a filter reaches 0 dB� the Ferret returns the filter to the queue. The Feedback Ferret continuously applies the least amount of attenuation required to eliminate feedback.
