User Manual

UAD Powered Plug-Ins Manual - 166 - Chapter 18: VCA VU
VCA VU Controls
The minimal controls on the UAD VCA VU make it very simple to operate.
Threshold Knob
The Threshold knob defines the level at which the onset of
compression occurs. Incoming signals that exceed the
Threshold level are compressed. Signals below the Thresh-
old are unaffected.
The available range is from -55dB to 0dB. The numbers on the graphical in-
terface indicate volts, as on the original hardware.
As the Threshold control is decreased and more compression occurs, output
level is typically reduced. Adjust the Output Gain control to increase the out-
put to compensate if desired.
Below
When the input signal is below the compression threshold value, the Below
LED illuminates. No compression is occurring when Below is lit.
Above
The Above LED illuminates when the input signal has exceeded the Threshold
value, indicating that compression is occurring. The higher the signal is above
the Threshold, the brighter the LED glows.
Compression The Compression parameter determines the ratio for the
compressor. Less compression occurs at lower values. The
available range is continuous, from 1.00:1 to Infinity:1.
Note: For compression to occur, signals must exceed the
Threshold value.
At values above approximately 10:1, the compressor behaves more like a
peak-limiter. See “Compressor Basics” on page 109 for more information
about compressor/limiter theory of operation.