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AM-55 / Sep 2015
A M - 5 5 G U I
Compressor Release
The Comp Rls
control determines how quickly the compressor returns gain to the
processing “floor” established by the leveller’s current value of gain reduction.
The main purpose of the leveller is to provide a processing platform for the compressor
to work off of. The leveller will never allow the compressor to achieve more GAIN as the
leveller and i
AGC is tasked with that duty, instead, the primary purpose of the compres
‑
sor is to catch any peaky audio the leveller misses because of its very slow, averaging
operation.
Ratio
The Ratio
determines the how tightly the multiband processing in this section controls
the audio. The range of adjustment is from 2:1 to 6:1. The Ratio for each band may
be set individually, and the Ratio settings apply to both the Leveller and Compressor
simultaneously.
AGC Mix
The Mix control may be used to tailor the spectral mix of the processed signal. Very
dramatic EQ changes can also be made using these controls. Generally we recommend
that the AGC Mix
controls be set flat and the parametric EQ used for EQ tailoring. If more
than the parametric EQ is required, small changes can be made here if needed, +/‑3dB
at most, for best on‑air consistency.
At the bottom of the
AGC Mix
tab option are five check boxes. These only appear
when the AGC Mix
tab is selected. These five check boxes allow you to mute specific bands
so you can “hear” what the unmuted bands sound like. Care should be taken when using
this feature since it will affect the audio on the air. Muting bands will unmask distortion
from the other bands and sometimes you may “forget” you’ve muted a band!
