Universal Audio UAD Plug-Ins ver.7.4.2 - Manual (Page 59)

UAD Powered Plug-Ins Manual - 59 - Chapter 4: API Vision Console Channel Strip
Release
When the input signal drops below the threshold level and the Release/Hold
switch is set to Release, this knob sets the amount of time it takes for signals
to decay to the Depth level.
Slower release times can smooth the transition that occurs when the signal
dips below the threshold, which is especially useful for material with frequent
peaks.
Fast release times are typically only suitable for certain types of percussion
and other instruments with very fast decays. Using fast settings on other
sources may produce undesirable results.
Hold
When the input signal drops below the threshold level and the Release/Hold
switch is set to Hold, this knob sets the amount of time that signals are held at
normal levels before signals return to the Depth level.
Note: When set to Hold, the release time is fixed at 100 milliseconds.
235L Release/Hold Switch
This two-position switch (REL/HLD) determines the behavior of the Re-
lease/Hold knob when the 235L module is set to Gate mode with the
Gate/Expander switch. The default value is Release.
Note: This switch is locked in the Release position when the module is in
Gate mode (Hold mode is unavailable in Expander mode).
235L Gate/Expander Switch
This switch (GTE/EXP) toggles the module between Gate and Expander
modes. The default value is Expander.
GTE
When set to Gate mode, signals below the threshold are attenuated by the
Depth amount.
EXP
When set to Expander mode, the gate applies downwards expansion at a
fixed 1:2 ratio, with the amount of gain reduction determined by the Depth
control.