Cleaning Up Audio With Noise Gate
A ‘noise gate’ (also called ‘gate’ or ‘audio gate’) is a dynamic processor that lowers the volume of a signal when the volume drops below the threshold. You can use a noise gate to remove quieter unwanted noise from your audio efficiently. Background noises, unwanted reverb tails, static, other instruments caught in the recording or the common ‘space-bar’ hit when you’ve finished recording can all be eliminated using a noise gate.
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Using a gate can make the channel sound clear and defined. It can also help you isolate the audio on that channel that you want to work with. For example, you might have recorded snare audio that has bleed from the cymbals and toms. By setting up the gate to only allow the snare through you can process that channel only affecting the snare sound and not the other sounds from the drum kit. To set up a gate, instantiate a noise gate plugin on the channel you wish to clean up. Set the threshold to 0dB, the ratio to ∞:1 or the highest possible setting, fast attack, fast lookahead, fast release and the ‘floor’ or ‘range’ should attenuate the audio as much as possible. These dramatic settings will help you find the correct threshold efficiently. Now slowly reduce the threshold until the audio you want to hear is passing through your gate unaltered. Now check that this threshold is attenuating the unwanted noise in other parts of your audio. If you’re happy with your threshold then you will want to adjust the settings of the attack, hold and release to work musically with your audio. You can increase your attack time until the gate is opening gradually and the transient of your signal sounds clean. Then increase the hold time until the gate is open long enough to allow the entire duration of the wanted signal to pass through. The release allows you to control how gently or abruptly your gate closes. Increase the release to work musically with your audio.
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Cleaning up your audio in this way will cleanse your mix and set the foundations of a mix that will sound pure and refined.
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Using a gate can make the channel sound clear and defined. It can also help you isolate the audio on that channel that you want to work with. For example, you might have recorded snare audio that has bleed from the cymbals and toms. By setting up the gate to only allow the snare through you can process that channel only affecting the snare sound and not the other sounds from the drum kit. To set up a gate, instantiate a noise gate plugin on the channel you wish to clean up. Set the threshold to 0dB, the ratio to ∞:1 or the highest possible setting, fast attack, fast lookahead, fast release and the ‘floor’ or ‘range’ should attenuate the audio as much as possible. These dramatic settings will help you find the correct threshold efficiently. Now slowly reduce the threshold until the audio you want to hear is passing through your gate unaltered. Now check that this threshold is attenuating the unwanted noise in other parts of your audio. If you’re happy with your threshold then you will want to adjust the settings of the attack, hold and release to work musically with your audio. You can increase your attack time until the gate is opening gradually and the transient of your signal sounds clean. Then increase the hold time until the gate is open long enough to allow the entire duration of the wanted signal to pass through. The release allows you to control how gently or abruptly your gate closes. Increase the release to work musically with your audio.
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Cleaning up your audio in this way will cleanse your mix and set the foundations of a mix that will sound pure and refined.
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Source: https://www.masteringthemix.com/
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