Noise Gates Assignment Instructions.pdf - Audio Noise Gates...

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Audio Noise Gates Assignment
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Audio Noise Gates Assignment Audio Noise Gates (usually called just “gates,”) are a dynamic effect that can be used to both clean up an audio track, and create a volume envelope for a recording. Made both as hardware devices, or software plug-ins, Noise Gates are similar to compressors in their controls, but compressors attenuate signals above a threshold, whereas noise gates attenuate signals that register below the threshold. Noise Gates also attenuate signals by a fixed amount, known as the range, not variably following the input signal level like a compressor does. All Gates will have the same general controls (or parameters). The only thing that changes between gates is the graphic representation or how they look, and maybe a few extra-added features a manufacture may add. Almost all Gates will have a Threshold, Gain Reduction or Range, Attack, Hold, & Release. With these 5 controls you can change the dynamic content of a track. Let me explain what each parameter does so that you can do this assignment properly. The Threshold: This setting is the dB level where the gate will respond and open. The audio level will trigger this setting as it comes into the noise gate’s circuit. Once the threshold level is crossed, the gate will react and open up the audio level to the
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original signal level. Once the signal drops below the threshold, the gate will again react and bring down the audio level to the set range or reduction amount. Setting this correctly is important as it will distinguish between the audio you want and the noise or audio you don't want. The Range or Reduction: This setting will tell you how many dB the original signal level will be attenuated or brought down after the signal passes below the set threshold level. Having the range set to -100 dB for instance will bring down the original signal level 100 dB, making the signal so low that it basically mutes out the signal. Setting the range to -6 dB would bring down the original signal level 6 dB, making the signal audibly sound about ½ the original volume. ( if you set the range to 0dB the gate will still work but you will get no reduction in the audio level, causing the gate to not really make any difference on your audio’s dynamics ) Attack: This setting will set how fast the gate will open up to full signal volume. This parameter is in milliseconds. Think of it as you can set how many milliseconds it takes the gate to fade the signal level up to its full level. This is just like an envelope on a synthesizer. The Attack time starts when the input signal goes above the threshold level you set and will take the user set amount of milliseconds to fade up to fully open. Note : on some cheaper hardware units, this maybe only a switch between fast and slow attacks.
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