MoogVCF.h

/***************************************************************************************************
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            fantastic  spatial  holophonic               synthesis    tool    kit
 
                                    copyright (c) fabian hummel
                                       www.github.com/fshstk
                                           www.fshstk.com
 
         this file is part of the fantastic spatial holophonic synthesis toolkit (fsh::stk)
  fsh::stk is free software: it is provided under the terms of the gnu general public license v3.0
                                    www.gnu.org/licenses/gpl-3.0
***************************************************************************************************/
 
#pragma once
#include <array>
 
namespace fsh::fx
{
class MoogVCF
{
public:
 
  struct Params
  {
    float cutoff = 1'000.0f; 
    float resonance = 0.1f;  
  };
 
  void setParams(const Params&);
 
  void setSampleRate(double);
 
  float processSample(float);
 
  void reset();
 
private:
  void calculateCoefficients();
 
  Params _params;
  double _sampleRate;
  double _resCoeff;
  double _p;
  double _k;
  std::array<double, 4> _stage = {};
  std::array<double, 4> _delay = {};
};
} // namespace fsh::fx