SimpleDelayPatch

[tom]

#ifndef SimpleDelayPatch_hpp
#define SimpleDelayPatch_hpp

#include “StompBox.h”
#include “CircularBuffer.hpp”

#define DELAY_BUFFER_LENGTH 32768 // must be a power of 2

class SimpleDelayPatch : public Patch {
private:
CircularBuffer <float, DELAY_BUFFER_LENGTH> delayBuffer;
float delayTime, feedback, wetDry;

public:
void processAudio(AudioInputBuffer &input, AudioOutputBuffer &output) {
const int size = input.getSize(); // samples in block
float* x = input.getSamples(); // arrays to hold sample data
float y[size];

delayTime = getParameterValue(PARAMETER_A); // delay time
feedback  = getParameterValue(PARAMETER_B); // delay feedback
wetDry    = getParameterValue(PARAMETER_D); // wet/dry balance
    
float delaySamples = delayTime * (DELAY_BUFFER_LENGTH-1);        
for (int n = 0; n < size; n++){             // for each sample            
  y[n] = x[n] + feedback * delayBuffer.read(delaySamples);
  x[n] = wetDry * y[n] + (1.f - wetDry) * x[n];  // crossfade for wet/dry balance
  delayBuffer.write(x[n]);
}
    
output.setSamples(x);

}
};

#endif // SimpleDelayPatch_hpp