Operating Manual - nX, nXe, and nXp Power Amplifiers
34
Feedback Suppressor
The Feedback Suppressor (FBS) provides automatic feedback control. This is done by constantly monitoring the audio
and automatically adjusting any one of 12 filters to remove feedback. Notch and Parametric Filter types are used, depending on
the characteristics of the feedback.
Note: The FBS function is only available on input channels and only at the 48 kHz sampling
rate.
This is because a feedback suppressor is most effective on an input channel rather than an output mix of channels, and the
FBS function is DSP resource-intensive.
Filter Parameters
Filter (number) -
Current Active Filter (highlighted).
Filter In/Out -
Green = Filter In (engaged), Red = Filter Out (disengaged).
Filter Lock -
Locks Filter at its current setting, when locked the detector will no longer adjust the filter.
Filter Mode -
There are three filter modes:
Restricted
: Filter will only broaden or deepen.
Floating
: Detector may release filter after float time or modify filter type.
PEQ
: Detector will not modify the filter however the user may control the filter.
Type -
Selected Filter Type (Parametric or Notch).
Frequency
- Selected Filter Center/Corner frequency.
Level
- Selected Filter Boost/Cut amplitude.
Bandwidth
- Selected Filter Bandwidth (or Q).
Feedback Detector Parameters
Sensitivity
- Detector Sensitivity to feedback
Float Time -
Time before a floating filter will start to release.
