zdf_moogladder_v2.h

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#pragma once
 
#include <cmath>

class ZDFMoogLadderFilter {
public:
    enum FilterMode {
        LP24 = 0,
        
        BP12 = 1,
        
        HP24 = 2
    };

    ZDFMoogLadderFilter(float sampleRate);

    void setCutoff(float cutoffHz);
    
    void setResonance(float r);
    
    void setMode(int newMode);
    
    void setDrive(float driveAmount);
    
    void reset();
    
    float process(float input);
 
private:
    float sampleRate;
    
    float resonance;
    
    float feedbackGain;
    
    float G;
    
    float drive;
    
    FilterMode mode;
    
    float stage[4];
    
    float z[4];
};