Advanced Feedback Suppression (Afs) - dbx Zone Pro 640 User Manual

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ZonePro
Section 4
Detailed Parameters
Freq 800 Hz to 8.00 kHz
This is the center frequency the De-Esser uses when in Band Pass mode or the corner frequency
used when in High Pass mode.
Amount 0 to 100%
This controls the amount of De-Essing. The amount control is very much like a combination
threshold / ratio control. A higher amount applies more De-Essing to the signal.
Type HP or BP
Selects the type of filter used by the De-Esser.
Width
Sets the Q of the Band Pass Filter.
4.8 - AFS (Insert Module)
The ZonePro™ offers the exclusive patent pending AFS (Advanced Feedback Suppression)
feedback elimination module. Feedback is caused when a microphonic signal such as a guitar
pickup or microphone is reproduced by an amplification and is repeatedly picked up in phase.
The AFS module of the ZonePro™ allows the user to optimize the elimination of feedback.
With the AFS algorithm active the ZonePro removes only the feedback frequencies without
affecting the remaining audio spectrum.
AFS On/Off
Turns the AFS module on and off. If AFS is Off, the filters are bypassed, and the algorithm is
halted (the filters are not updated). If AFS is On, the filters are active, and the they are updat-
ed according to the current selected mode (Fixed or Live).
Clear Live and ClearAll
These buttons (when selected) clear the filters. If Clear Live is selected, only the live filters are
reset. If Clear All is selected, then all of the filters are reset.
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ZonePro ™ User Manual
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