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Stereo noisegate

To prevent crackling, hissing or other disturbing signals when no usable signal is at an ADC-input, we use noisegates to keep noise out of our audio-mix. The following snippet shows a stereo-noisegate with adjustable threshold, range-control and adjustable coefficients for attack, release and hold. The calculation of these coefficients can be found down below. For…

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Stereo biquad IIR Filter

The following logic is a stereo biquad IIR filter to calculate low-pass, high-pass, notch, band-pass or peak-filters with a very low latency. It uses 13 clock-cycles to calculate a stereo-signal and at 100MHz the block is ready after 130 nanoseconds. The calculation of the coefficients can be found down below. Have a look at my…

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