User Manual

ALF-DSP 88-U
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3.4.9 Ducker
A ducke r is used to attenuate or cut the level of the channel based on signal level from a secondary signal input or
channel. When the level of the reference channel exceeds the specified threshold, the level of the specified channel
will be attenuated, in essence ‘ducking’ the signal level.
Threshold: The reference signal begins to decay above the threshold and recovers below the threshold.
Depth: The amount the signal is reduced by when the ducker is activated.
Attack time: Attack time refers to the time taken for the attenuation to activate after the threshold has been
passed.
Release time: The release time is opposite to the attack time and refers to the time taken for the attenuation to
be released after the threshold is no longer passed by the reference signal.
Hold time: The hold time determines how long attenuation remains after the signal has dropped be low the
threshold.
3.4.10 Ambient Noise Compensation (ANC
An ambient noise compensator is used to automatically adjust output volume according to a reference signal input.
When the reference signal increases or decreases with changing ambient noise picked up by a reference
microphone, the output volume of the specified channel can be increased or decreased based on the set
parameters.
Maximum gain: Sets the maximum amount to which the signal level can be adjusted.