noise_gate_t Struct Reference

Noise gate settings and state. More...

#include <lib/audio/mixer.h>

Data Fields
float	threshold
	Gate threshold in linear units (e.g., 0.01f for -40dB)
float	attack_ms
	Attack time in milliseconds (how fast gate opens)
float	release_ms
	Release time in milliseconds (how fast gate closes)
float	hysteresis
	Hysteresis factor (0-1, prevents gate chatter)
float	sample_rate
	Sample rate in Hz (set during initialization)
float	envelope
	Current envelope follower state (linear, 0-1)
float	attack_coeff
	Attack coefficient (converted from attack_ms)
float	release_coeff
	Release coefficient (converted from release_ms)
bool	gate_open
	True if gate is currently open (allowing audio through)

Detailed Description

Noise gate settings and state.

Implements noise gate to suppress background noise below threshold. Uses hysteresis to prevent gate chatter (rapid opening/closing).

GATE BEHAVIOR:

• Closes (mutes) when input is below threshold
• Opens (allows through) when input is above threshold
• Hysteresis prevents rapid on/off cycling
• Smooth attack/release prevents clicks and pops

Note

Hysteresis means gate opens at threshold but closes at threshold * hysteresis (lower level), preventing chatter.

Definition at line 180 of file mixer.h.

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The documentation for this struct was generated from the following file:

• mixer.h