Dynamic Processing

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  • Dynamic Processing
    • Compression
      • Parameters
        • Threshold
          • The dB level at which the compressor begins to act
        • Attack
          • How quickly the compression begins once the threshold has been exceeded (ms)
        • Knee
          • How suddenly the compression kicks in, a hard knee is instant, a soft knee is gradual
        • Ratio
          • How much compression is applied, e.g. a 5:1 ratio means that for every 5 dB the input increases, the output increases by 1dB
        • Release
          • How many ms after the signal has fallen below the threshold does it take for compression to stop
        • Makeup Gain
          • Increases the output gain of the signal to compensate for the loss of volume (dB)
      • Reduces the dynamic range of a signal
      • Used to be done 'on the fly' in analogue studios by 'riding the fader'
    • Expansion
      • Do the opposite job to compressors, but have the same controls
        • Expands the dynamic range, usually to reduce noise
      • Gating
        • Cuts off the output below a certain threshold
        • Parameters
          • Threshold
            • The dB level below which the signal is cut
          • Attack
            • How quickly once the threshold is exceeded does the gate open (ms)
          • Hold
            • How long after the signal falls below the threshold does the gate stay open (ms)
          • Release
            • How suddenly the gate closes. E.g. is it gradual or fast?
        • Can be sidechained and triggered by a kick drum to create a ducking effect in a bass
          • Common in dance music


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