This filter uses the Steve Harris LADSPA Gate plugin, whose parameters are based on the Drawmer DS201.
This filter is used to reduce some noise like a hum or echo or to reduce cross-talk between microphones that were targeting different sources.
Key Filter: Low Frequency
Controls the cutoff of the low frequency filter (highpass).
Key Filter: High Frequency
Controls the cutoff of the high frequency filter (lowpass).
Output Key Only
Controls output monitor. When checked, it is the output of the key filters (so you can check what is being gated on). Otherwise, it is the normal, gated output. Disable the filter in Shotcut’s list of filters to achieve bypass (or trim the filter to bound it by a time range).
Threshold
Controls the level at which the gate will open.
Attack
Controls the time the gate will take to open fully.
Hold
Controls the minimum time the gate will stay open for.
Decay
Controls the time the gate will take to close fully.
Range
Controls the difference between the gate’s open and closed state.