MoogLadderFilter.h

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#pragma once
#include <cmath>

class MoogLadderFilter {
public:
    MoogLadderFilter(float sampleRate);
    
    void setSampleRate(float rate);
    
    void setCutoff(float cutoffHz);
    
    void setResonance(float resonanceAmount);
    
    float process(float input);
 
private:
    float sampleRate;        
    float cutoff;           
    float resonance;        

    float y[4] = {0.0f};    
    float oldx = 0.0f;      
    float oldy = 0.0f;      

    float tuning;           
    float feedback;         

    void updateCoefficients();
};