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Aura8ip / Jan 2012
A u r a 8 i p P r o G U I
Output Trim
Each limiter band is followed by its own Output Level mix control which can be
used to make fine adjustments to the final tonal balance. Because the setting of these
controls can be fairly touchy, we recommend leaving them at 0dB unless a specific
sonic effect is desired.
Multiband Limiter Options
The multiband limiter is equipped with two other operating
modes besides simply on and off. On and Off is controlled by
the checkbox labeled
MB Lim
. The other two options require
some explanation.
MB Lim Soft
– Checking this box enables a small amount
of anticipation in the limiter behavior, causing it to start to
limit approximately 2dB below the absolute limit threshold as set by the Band x Thresh
control. This anticipation serves to soften the limiter action by making it “spongy.”
That is, it will ooze in and out of limiting in a softer fashion which makes it quite ef
-
fective (and good sounding) in voice applications.
Bass Enhance
– This checkbox enables a Vorsis-proprietary algorithm which enhances
low bass without creating intermodulation distortion or muddiness. It enhances the
sound of bass when heard on small, bass shy speakers and adds richness to the sound
without adding noticeable distortion.
Look Ahead Final Peak Limiter
The final section of processing is the Lookahead Limiter with its
defeatable lookahead function. In studio applications, the final limiter
can probably be defeated. However, if the audio destination is a method
of transmission (STL, audio stream, uplink) with a defined maximum
peak input level, or if you want to recreate a “radio” sensation for talent
headphones, using this limiter is a good idea.
Final Lim. Drive
This control sets the drive level for the final peak limiter. The preferred
way to set this control is to adjust the Final Lim. Drive until there is 1dB
to 3dB of indicated limiting on the final limiter meter.
Attack
This control sets how quickly the limiter will react to audio peaks.
While the range for this control is 0.2 to 30ms, Vorsis recommends a
setting between 0.2 and 10ms. Anything slower than 10ms will not yield
effective peak control.
Release
This control sets how quickly the limiter will recover after reacting to an audio peak
and after the level drops. The range of this control is 33ms to 330ms, with a recom
-
mended setting of around 180ms.
