Apply the noise gate if you want to control the volume of a media file's audio signal by blocking audio that falls below a specified threshold or decibel level. The resulting audio can then be processed differently from the original audio.
To apply a noise gate to audio, do this:
1. | Select the media file in the library that you want to apply the noise gate to. |
2. | If required, use range selection to select the portion of audio you want to apply the effect to. See Range Selection for more information on selecting a range of an audio file. If you don't select a range, the effect is applied to the entire audio clip. |

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Note: the entire audio file's waveform is selected by default when this feature is opened. If you want to apply this feature to the entire audio file, you do not need to use range selection when the entire waveform is selected.
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3. | Decide whether you want to apply the effect on all the available channels, or just one channel. See Selecting Channels for Editing for more information on selecting channels. |
4. | Click Noise Gate under the Apply Effect section. |
5. | Select a noise gate preset from the Presets drop-down. Select the preset that best suits the sound you want to achieve. |
6. | If required, click to modify the advanced settings as follows: |
• | Threshold: use this slider to determine the minimum input audio level required to make the noise gate open and pass the audio signal through. |
• | Attack time: use this slider to set the duration that the noise gate takes to change from closed to open. Attack time is similar to a fade-in. |
• | Release time: use this slider to set the duration it takes for the noise gate to change from fully open to closed. Release time is similar to a fade-out. |
• | Hold time: use this slider to set the duration the noise gate stays open after the signal has fallen below the defined threshold. |
7. | If required, you can preview how the applied effect will sound by selecting Adjusted result and then clicking the play button on the playback controls. Select Original audio if you want to play the original audio. |
8. | Click Apply to add the noise gate to the audio. |

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Note: if required, click on the Effect tab to see the applied effect in the edit panel. See Effect Tab for more information.
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