Gate

Gate operator properties for Script Engine. Silences (or attenuates) the audio when its level falls below a chosen threshold. Useful for muting microphones during pauses, suppressing room tone or background hum between speech phrases, and cleaning up multi-mic mixes where every open mic adds noise. Built on FFmpeg's compander filter, with broadcast-style controls (threshold, ratio, attack/release, knee, gain reduction, makeup gain) plus advanced detector settings.

Property	Type	Access	Description
`InputGainDb`	`float`	`get/set`	Pre-gate gain applied to the input, in decibels. [min=-24, max=24, default=0]. 0 leaves the signal unchanged. Negative values reduce the input level; positive values boost it before the gate processes it.
`GainReductionDb`	`float`	`get/set`	How much the gate attenuates the signal when closed, in decibels. [min=-36, max=0, default=-36]. −36 dB silences the audio completely (full gate); less negative values leave a quiet "duck" of the original through (often preferable on speech to avoid sudden cut-outs). 0 dB effectively disables the gate.
`ThresholdDb`	`float`	`get/set`	Level below which the gate closes, in decibels relative to full scale. [min=-48, max=0, default=-24]. Audio quieter than this triggers the gate; audio louder is allowed through. Set this just above the noise floor — too low and the gate barely engages, too high and it chops off legitimate quiet content.
`Ratio`	`float`	`get/set`	How aggressively the gate closes below the threshold. [min=1, max=20, default=4]. 1:1 effectively disables the gate. Higher values produce a more decisive close — useful for hard gating noisy mics, while lower values give a softer "ducking" effect.
`Attack`	`float`	`get/set`	How quickly the gate opens when the signal exceeds the threshold, in milliseconds. [min=1, max=200, default=20]. Short values catch the start of words and percussive sounds; longer values can clip fast onsets.
`Release`	`float`	`get/set`	How quickly the gate closes after the signal drops below the threshold, in milliseconds. [min=5, max=5000, default=250]. Short values close abruptly between words (more obvious gating); long values let the natural tail of words fade out before muting.
`Knee`	`float`	`get/set`	Soft-knee width around the threshold. [min=1, max=8, default=2.8]. Low values give a hard, decisive open/close; high values give a gentle, gradual engagement around the threshold.
`MakeupGainDb`	`float`	`get/set`	Extra gain applied after the gate to raise the overall level. [min=0, max=24, default=0].
`OperationMode`	`CompressorMode`	`get/set`	`CompressorMode` — operating mode / gating direction. Reuses the underlying compressor's mode setting. The standard mode for a gate is the one that pulls down quiet parts (i.e. cuts when the signal is below the threshold), which is what most users want.
`Link`	`CompressorLink`	`get/set`	How left and right channels are linked when the gate decides whether to open or close. Linked detection keeps the stereo image stable; independent detection gates each channel separately.
`CompressorDetection`	`CompressorDetection`	`get/set`	How the gate measures the input level — peak vs. RMS. Peak detection reacts to instantaneous peaks (more aggressive on transients). RMS reacts to the smoothed loudness over time (more transparent on speech and music).
`ResetCommand`	`Command`	`get`	Reset all settings to their defaults.
`SamplesRendered`	`int`	`get`	Total number of audio samples processed by the gate (read-only, debug).

Inherits from: AbstractAudioOperator, AbstractOperator, AbstractAudioMetering.

See also: Gate in Operators — user-facing introduction, screenshots, and section summaries.