Compression Ratio - PRESONUS StudioLive 16.4.2 User Manual

2 Controls & Connections
2.3 The Fat Channel
Dynamics Processing and EQ
2.3.2
Turns the Auto Button On
Soft Knee/Hard Knee Toggle
Button
Compressor Threshold

Compression Ratio

Enables Automatic Attack and Release Mode.
When Auto mode is active, the Attack and Release
controls become inoperative, and a preprogrammed
attack and release curve is used. In this mode, the attack
is set to 10 ms, and the release is set to 150 ms. All other
compressor parameters can still be adjusted manually.
Engages Soft-Knee Compression.
In normal operating mode, the compressor is set for
hard-knee compression, meaning that the gain reduction
applied to the signal occurs as soon as the signal exceeds
the level set by the threshold. When the Soft Knee button
is engaged, the onset of gain reduction occurs gradually
after the signal has exceeded the threshold.
Sets and Displays the Threshold of the Compressor
for the Selected Channel or Ouput Bus.
This encoder sets, and the meter displays, the threshold
of the compressor for the selected channel or output bus.
When the signal's amplitude (level) exceeds the threshold
setting, the compressor is engaged. Turning the knob
counterclockwise lowers the threshold, so compression
begins at a lower amplitude. The threshold can be set
from -56 to 0 dB.
Sets and Displays the Compression Ratio Setting
for the Selected Input Channel or Output Bus.
This encoder sets, and the meter displays, the com-
pression ratio (or slope) for the selected channel or
output bus. The ratio sets the compression slope, which
is a function of the output level versus the input level. For
example, if you have the ratio set to 2:1, any signal levels
above the threshold setting will be compressed at a ratio
of 2:1. This means that for every 2 dB of level increase
above the threshold, the compressor's output will only
increase 1 dB. The ratio can be set from 1:1 to 14:1.
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