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Frequency response is the quantitative measure of the output spectrum of a system or device in response to a stimulus, and is used to characterize the dynamics of the system.

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Plotting the magnitude response of a biquad filter

I've put together a multi-band audio EQ using biquad filters. I'm getting the coefficients using the methods from the RBJ cookbook. Now I want to plot the curve showing the magnitude response. I'm u …
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Plotting the magnitude response of a biquad filter

Someone over at the KRV forum pointed out that I need to normalize my coefficients so that a0 = 1. b0 /= a0; b1 /= a0; b2 /= a0; a1 /= a0; a2 /= a0; a0 = 1;
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