Specifications

24
FEEDBACK REDUCER
The feedback reducer section allows you to add new feedback filters or edit the frequency, depth
or type of existing ones. To access the DFR control window, click on the DFR button on the Main
Control Panel.
Feedback Reducer Controls
Lock Filters Button
Click on the LOCK button to lock the filters at their current values. The light bar illuminates
red when the lock is active. The DFR11EQ will not set any new filters or change the depth of
any existing feedback filters. This is identical to the LOCK button and LED on the front panel of the
DFR11EQ.
Clear Filters Button
Click on the CLEAR button to clear feedback filters. A dialog box will come up prompting
you to clear one filter, all filters, or the entire block. Click on the CLEAR ONE to clear only
the currently selected filter, the CLEAR ALL button to clear all filters and the Output gain control.
Then click on the OK button. The Clear function is active even if LOCK filters is active.
Feedback Filters Buttons, LEDs, and Related Fields
On the Feedback Filter display, there are 10 LEDs representing
each of the 10 feedback filters. The LEDs illuminate from left to
right, with the LEDs on the left representing the fixed filters. In or-
der to view the settings of a specific filter, click on the filter’s LED. The arrow will identify the selected LED.
When a filter is selected, the current settings of that filter will appear in the FREQ., DEPTH, and TYPE
fields. You can click on a filter to select it, then edit that filter directly by clicking on the arrow buttons beside
the FREQ., DEPTH, and TYPE fields:
FREQ. — This field displays the frequency center of the selected filter. Click
on the ↑ and ↓ buttons to adjust the frequency of the filter, or type the desired
frequency in the field.
DEPTH — This field displays the depth of cut for the selected the filter. Click
on the ↑ and ↓ buttons to adjust the depth in 0.5 dB increments, or type the
desired depth in the field.
TYPE — This field displays the Q, or width, setting of the selected filter. The type of each filter
can be selected individually using this field. Click on the ↓ button beside the field to reveal the two
options: Low Q and High Q. Select one of these options.
To PEQ Button
When filters are created in the Digital Feedback Reducer, they are created as adaptive
notch filters. When you click on the TO PEQ button, a dialog box will be launched which
will allow you to convert one or all of these filters to parametric filters. Once an adaptive notch filter
has been converted to a parametric filter, it cannot be converted back to a adaptive notch filter.
NOTE: This feature only converts adaptive notch filters to parametric filters if there are enough un-
used parametric filters.
Table of Contents