What is noise gate?

A noise gate is a type of audio processing device that is used to control the levels of unwanted noise in a signal. It works by only allowing signals that are above a certain threshold level to pass through, while attenuating or completely eliminating signals that are below the threshold.

Noise gates are commonly used in recording studios and live sound settings to reduce background noise, hum, hiss, and other undesirable sounds that can detract from the quality of a recording or performance. They are particularly useful for cleaning up audio signals from sources such as microphones, guitars, keyboards, and other instruments.

Noise gates can be adjusted to set the threshold level at which they operate, as well as the attack and release times that determine how quickly the gate opens and closes. This allows users to fine-tune the effectiveness of the gate in eliminating unwanted noise while allowing the desired signal to pass through unaffected.

In addition to standalone hardware units, noise gates are also available as software plugins that can be used in digital audio workstations (DAWs) for more precise control over noise reduction in recordings. Overall, noise gates are an essential tool for audio engineers and musicians looking to improve the clarity and quality of their recordings and performances.