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INTELLIGATE XR2000
Dynamic feedback control is a better solution. Similar to the de-esser application, the Key Filter section is
inserted into the sidechain path by pressing the FILTER switch. To effectively suppress feedback, the centre
frequency of the filters are correctly adjusted to match the room’s resonant frequency. This selected frequency
now controls the BEHRINGER INTELLIGATE.
As soon as feedback occurs, the unit temporarily reduces the system gain and thus effectively suppresses the
feedback. In contrast to the technique mentioned above, the frequency response of the PA system is not
affected in any way at all. The use of the BEHRINGER INTELLIGATE in this application can eliminate the
possibility of speaker or ear damage.
Fig. 4.2: Reducing feedback in audio systems using the INTELLIGATE
5. EXTERNAL SIDECHAIN APPLICATIONS
5.1
The “Key External” function
The BEHRINGER INTELLIGATE offers an exceptionally usable external facility by using the key external
function. By activating the KEY EXT switch, the INTELLIGATE’s control path is disconnected from the audio
input and therefore interrupted. The audio input is routed to the KEY SEND output and the KEY RETURN input
now receives the new control signal which is derived from an inserted effects processor.
5.2
Using an equalizer in the sidechain path
It is very common to make the response threshold of an expander/gate frequency-dependent. This is the
reason why the high and low pass filters of the Key Filter section are included.
Although the Key Filters are provided with a slope of 12 dB/octave, there are applications which require a more
complex frequency selection. If for example frequency bands, which are not located side by side, are required
to trigger the expander, the internal Key Filter section would not be able to fulfill this demand. The use of an
external graphic or parametric equalizer becomes necessary. By depressing the KEY EXT switch, an external
unit can now be inserted into the sidechain path. Additionally the Key Filter section of the INTELLIGATE can
be used by depressing the FILTER switch.
To retain the threshold setting of the INTELLIGATE, unwanted frequencies should be reduced by an equalizer
and the desired frequencies should be kept at the same level. Should for example, the expander be controlled
by a narrow mid-frequency band, it is advisable to lower the bass and treble controls. The middle frequency
control remains at 0 dB.
5. EXTERNAL SIDECHAIN APPLICATIONS
