Technical data

DOC-01-TELAS-CRG-4 ASTi ACE Studio Components Reference Guide Rev.M
104 Copyright © 2014 Advanced Simulation Technology inc.
6.2. CompressorLimiter
Summary: The CompressorLimiter reduces the volume of loud sounds.
Description: This component has two stages that work together to keep volume
(signal levels) under control. In the first stage, the compressor reduces the volume
of the signal when its average (RMS) level exceeds the threshold. In the second
stage, the limiter then prevents peak levels from exceeding the LimThreshold. This
makes it a useful tool for preventing sound levels or clipping that could cause
damage to equipment or your hearing.
Audio Input
InSignal
Type Default Value
audio n/a
Description: The signal that will be filtered. This input is linked
into the component from somewhere else in the model.
SideChain
Type Default Value
audio n/a
Description: A second audio input which is used for level
calculations if SideChainEnable is True. In this mode, the InSignal
is compressed only if the sidechain exceeds the threshold. This is
useful for controlling the relative volumes of two sounds.
Control Input
Attack
Type Default Value
float32 350.0
Description: Determines how quickly the gain is turned down when
the signal level goes above the threshold. Values are in dB/sec.
Higher attacks produce a more aggressive rate of gain reduction.
Control Inputs
Comp
OutGain
Type Default Value
float32 1.0
Description: A gain applied to the signal after the compressor stage
but before the limiter stage.
Enable
Type Default Value
boolean True
Description: Controls whether the compressor stage will do any
gain adjustment.
LimAllow
Clip
Type Default Value
boolean False
Description: If True, the signal peaks will be hard clipped at the
LimThreshold level. This can be used to produce radio distortion-
like effects.
LimEna-
ble
Type Default Value
boolean True
Description: Turns the limiter stage on or off in the component. If
True, the peak output levels of the component will not go above the
LimThreshold.
LimRe-
lease
Type Default Value
float32 100.0
Description: The rate, in dB/sec, that determines how quickly the
limiter responds to a drop in signal levels. Higher releases cause a
faster increase in gain to ensure quiet signals are not reduced in
volume.