Metric Halo Mobile I/O - Manual (Page 281)

+DSP
281
When the detected level is below the
Threshold
, the gain cell passes the signal with no change.
Conversely, when the detected level is above the
Threshold
, the signal is attenuated based upon
the
Knee
and the level of the signal above the
Threshold
.
When the
Knee
is set to 0, MIOLimit acts a hard-threshold brickwall limiter.
When the
Knee
is set to a value above 0, the knee will be softened, and the effective ratio will increase
gradually from 1 to infinity. The transition is made more gradual as the
Knee
is increased from 0 to 1.
After the limiter gain-reduction has been applied to the signal, an additional make-up gain block
applies a user specified
Makeup Gain
to the signal. If the
Auto Gain
has been enabled, the user
specified
Makeup Gain
is applied in addition to the limiter computed make-up gain.
After the make-up gain has been applied, the output signal is limited to level specified by the
Out
Ceiling
. This output ceiling limiter captures the effects of fast-transient breakthrough and is espe-
cially useful when using MIOLimit on highly impulsive signals with large compression ratios.
Parameters:
Enable
{Off, On}
Enables the limiter.
Threshold
[-60, 0] dB
Sets the threshold at which the limiter begins to act. There will be no gain reduction applied by
the limiter when the input signal is below this threshold.
Release
[5 µ , 5] s
The characteristic release time of the application of the gain reduction. Longer release times will
cause MIOLimit to be maintain the gain reduction for a longer period of time after transients.
Longer release times are appropriate when using MIOLimit as a leveling amp/AGC. Alternatively,
shorter release times are appropriate when using MIOLimit to increase the apparent level of im-
pulsive material. Very short release times can lead to distortion in the output signal. The release
time is applied in the detector stage of MIOLimit.
Knee
[0, 1]
Adjusts the shape of the knee of the limiter as the detector goes above threshold. When knee is
set to 0, the transition from no gain reduction to the specified ratio is immediate at the specified
threshold. As this parameter is increased, the transition between the 1:1 ratio and the specified
ratio is made more and more progressive, thus "softening" the action of the limiter.
Out Ceiling
[-120, 0] dB
Sets the maximum output level of the limiter. The output signal is hard-clipped, post limiter, at
this signal level.
Makeup Gain
[-30, 30] dB
Sets the additional gain applied to the signal post limiter. Is used to raise sub-threshold signal level
rather than reduce the super-threshold signal level.
Auto Gain
{Off, On}
When enabled, causes the limiter to automatically adjust the makeup gain to keep full-scale input
approximately at full-scale on output. This is a huertistic rule, and will likely need to be trimmed
by the user using the
Makeup Gain
.
SC Source
{Off, On}
Chooses the detector input source. Select between the input signal, and the sidechain input.