Frequency Selective Operation; Frequency Selective Filtering Of Unwanted Signals; Suppressing Instruments During Recording; Reducing Feedback In Pa Systems - Behringer INTELLIGATE XR2000 User Manual

Proceed as follows:
1. Rotate the THRESHOLD control anticlockwise until the GAIN REDUCTION meter shows an appropriate
drop in level.
2. Now press the KEY LISTEN switch and accurately adjust the corner frequencies of the key filters (generally
6 - 10 kHz) by monitoring, until it is within the range of the sibilants.
3. Release the KEY LISTEN switch and recalibrate the THRESHOLD control, so that the unit only reacts
when the sibilant sound occurs.
Although the recommended attack and release times for this function are proven, the time parameters can be
adjusted if necessary, to achieve maximum results.

4.2 Frequency selective operation

4.2.1 Frequency selective filtering of unwanted signals

Based on the set-up described in the de-esser section, the unit may also be used to eliminate rumble, hum
and equipment noise (air-conditioning systems, camera noise etc.).
Using the KEY LISTEN switch, adjust the frequencies of the key filters to match the unwanted frequencies.
Take care to decrease the amplitudes of the unrequired frequencies. Proceed now as described in the previous
chapter. This will result in ducking of the selected frequencies and thus a decrease in the gain of the programme
material.

4.2.2 Suppressing instruments during recording

Another function of the BEHRINGER INTELLIGATE allows helpful correction of previously recorded material.
If for example, an excessively loud bass drum needs to be suppressed, reduce all the key filter frequencies
above 150 Hz. This setting causes frequency specific ducking, which reacts as soon as increased energy is
detected in this band. By increasing the threshold level, the ducker can be made to react to loud hits only.
Generally, it can be said that relatively high threshold settings prevent the overall sound from being impaired
and lead to the ducking of solo instruments or very loud sounds.

4.2.3 Reducing feedback in PA systems

A common procedure in sound system set-up is equalizing the acoustic to remove feedback. This is generally
accomplished by turning up the system gain to purposely induce feedback, searching for the centre frequency
of the feedback and then equalizing at that frequency to remove the feedback.
Once this feedback has been attenuated, the system gain is again increased to induce another feedback point
and the whole procedure is repeated until the engineer is satisfied that the significant problem frequencies have
been corrected. In spite of this equalizing process, feedback remains a difficult problem. Often enough, acoustic
changes occur as the audience enters the room, which again leads to feedback problems. In addition, the
frequency response of the whole system is modified and thus affected by equalizer operation.
INTELLIGATE XR2000
Controls
KEY EXT switch
KEY LISTEN switch
FILTER switch
THRESHOLD control
RATIO control
ATTACK control
HOLD control
RELEASE control
RATIO control
RANGE control
DUCKER switch
IN/OUT switch
Tab. 4.1: Initial settings for the De-Esser function
4. SPECIAL APPLICATIONS
Settings
OUT
OUT
IN
+20 dB
clockwise
1 ms
anticlockwise
100 ms
clockwise
20 dB
IN
IN
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