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4. CONTROL ELEMENTS
The Behringer FEEDBACK DESTROYER is equipped with ten parameters keys, one jog wheel (rotary con-
trol) which is used to alter the selected parameter or preset and a numeric LED display. Each of the 24 filters
has one LED assigned to it, which informs you about the status of the filter. By means of an 8-stage LED
meter each of the two fully independent channels can be monitored.
4.1 Keys for parameter selection / jog wheel (rotary control)
12
1
With Filter Select activated you use the jog wheel to select one of the 12 filters per channel.
2
The Filter Mode key gives you access to the four operating modes Off, Parametric EQ (PEQ), Single-
Shot and Auto Mode. In addition to that you can edit the threshold of feedback suppression (-3 to -9
dB) by pressing the Filter Mode and the Gain key together for about 2 seconds.
3
Use the Engine L key to select the left audio channel.
4
Use the Engine R key to select the right audio channel. If you wish to process the left and right
channels simultaneously ( Couple mode), press both Engine keys at the same time.
5
Press the Frequency key to select the frequency you wish to process. The FEEDBACK DESTROYER
splits up the adjustable frequency range (20Hz to 20 kHz) into the 31 standard ISO values of a graphic
EQ (see 1.1.2).
6
The Fine key allows you to fine tune the standard ISO frequencies (in 1/60-octave steps) within a
tuning range of 1/3 octave (-9/60 to +10/60).
7
Bandwidth determines the filter bandwidth of the selected filter. The adjustable value ranges from 2
octaves (120/60 octave) down to 1/60 octave.
8
The Gain key sets the desired boost/cut of the selected filter in dB (+16 dB/-48 dB).
9
The In/Out key allows for optional bypassing the parametric filters or all filters. By shorty pressing the
In/Out key only the parametric filters will be deactivated and the green LED ends up lighting. Hold
down the In/Out key for about two seconds to deactivate all filters. A cyclically flashing LED will indi-
cate this Total-Bypass mode. One further pressing reactivates all filters. The LED flickers when rel-
evant MIDI data is received.
Fig. 4.1: Front panel controls elements
1
3
5
2
4
6
Fig. 4.2: Entry keys and jog wheel
4. CONTROL ELEMENTS
7
9
8
10
11
15
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