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Improved VCF HP output and added proposal for a BP output

I have replaced the previous Fundamental VCF HP output formula with the correct one, and I have added a commented instruction which could be used to provide a BP output as well if wanted.

Note : I have not tested yet the submitted change, but these formulas are the one I use all the time in my own Moog-like / transistor ladder filter algorithms, such as the one in Sonic Academy ANA 2.

For more information about the formula I have used, see there : http://www.kvraudio.com/forum/viewtopic.php?t=207647
tags/v1.0.1
Ivan COHEN GitHub 5 years ago
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8ae3bd5249
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1 changed files with 2 additions and 1 deletions
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    -1
      src/VCF.cpp

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src/VCF.cpp View File

@@ -140,7 +140,8 @@ void VCF::step() {

// Set outputs
outputs[LPF_OUTPUT].value = 5.0f * filter.state[3];
outputs[HPF_OUTPUT].value = 5.0f * (input - filter.state[3]);
outputs[HPF_OUTPUT].value = 5.0f * (input - 4*filter.state[0] + 6*filter.state[1] - 4*filter.state[2] + filter.state[3]);
//outputs[BPF_OUTPUT].value = 5.0f * (filter.state[1] - 2*filter.state[2] + filter.state[3]);
}




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