User`s manual

AEQ FORUM - DIGITAL AUDIO MIXER FOR BROADCAST APPLICATIONS

Noise Gate configuration screen

When establishing the settings, the threshold for the noise gate will be much lower than in the

case of the compressor, as its operation is the opposite. The noise gate prevents the passing of

lower levels of the signal that could be considered noise. Therefore, the range of settings is

different. In addition, there is an additional parameter for noise gates, which is “Hold Time.” This

is a safety period used to prevent the gate from accidentally closing if a signal is suddenly

absent, for example, in speech.

In addition, the threshold must be adjusted to a level slightly higher than the level of the noise to

be avoided. Thus, the threshold will be set at a very low level. Above the threshold, the noise

gate does not act (unity gain), letting the rest of the signal through without processing it. The

gate remains closed; i.e. when the signal surpasses the threshold level, the gate opens. The

attack time is the time the gate takes to open (unity gain) when it receives a signal whose

amplitude exceeds the threshold level; this time must be short to avoid cutting off the beginning

of a sentence or song. The release time is the time the gate takes to close when the signal level

falls below the threshold. The hold time is the minimum time during which the gate remains

open; it is used to prevent the gate from closing when the signal level drops briefly—for

example, when an announcer pauses while speaking. The hold time prevents the gate from

opening and closing constantly in the presence of a signal whose level fluctuates in a range

close to the threshold level.

The NGATE contextual key enables you to activate the noise gate whose parameters are

shown at that time on the screen. The activation of the compressor is confirmed through the

LED included in the contextual key in question and through the LED associated with DYN in the

active process indicator section of the control surface. See section 2.1.1.5. Active Process

Indicators, of this manual.

3.4.3.1.2. Equalizer and Filter Menu

Pressing the EQ contextual key from the SELECT menu of an audio input channel will give you

access to the menu dedicated to configuring the equalizer and filters. The upper part of the

screen contains the information present in the previous screen, relative to the channel identifier

name and the associated hardware.

The middle area of the screen shows the graphic representation of the response curve of the

equalizer and filters that are active at that time.

3-band EQ screen