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IIR filter relaxation time computation

You know that calculating the impulse response from the transfer function involves partial fraction decomposition, whether it's in $s$ or $z$. After that you simply apply the inverse $z$-transform to ...
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Filter type selection for signal envelope detection

Obviously, when the envelope detection is of concern, the signal (e.g., a sound signal) must be reconstructed so that it looks like the original one as much as possible which means maximising SINAD (...
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How to create a frequency weighted measurement? / How to design a Pinking FIR Filter?

If you want to a simple pink filter you can just use this https://ccrma.stanford.edu/~jos/sasp/Example_Synthesis_1_F_Noise.html The pink filter is minimum phase so it can easily be inverted by ...
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Calculating and controlling the location and bandwidth of individual notches in an allpass phaser

Although the name phaser comes from the chain of phase only (all-pass) filters, you don't have to implement it that way. Instead, have a cascade of second order notch sections. You can put the ...
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Calculating and controlling the location and bandwidth of individual notches in an allpass phaser

There are different ways to approach this. Let's start with a few properties. A second order allpass has one complex conjugate pole pair (and the zeros that are the inverse of the poles. The phase ...
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