void setup()
{
  size(512, 200, P2D);
  
  minim = new Minim(this);
  int buffer = 1024;
  out = minim.getLineOut(Minim.STEREO, buffer);
  in = minim.getLineIn(Minim.STEREO, buffer);
  signal = new InputOutputBind(1024);
  //add listener to gather incoming data
  in.addListener(signal);
  // adds the signal to the output
  out.addSignal(signal);
}
 

class InputOutputBind implements AudioSignal, AudioListener
{
  private float[] leftChannel ;
  private float[] rightChannel;
 InputOutputBind(int sample)
  {
    leftChannel = new float[sample];
    rightChannel= new float[sample];
  }
  // This part is implementing AudioSignal interface, see Minim reference
  void generate(float[] samp)
  {
    arraycopy(leftChannel,samp);
  }
  void generate(float[] left, float[] right)
  {
     arraycopy(leftChannel,left);
     arraycopy(rightChannel,right);
  }
 // This part is implementing AudioListener interface, see Minim reference
  synchronized void samples(float[] samp)
  {
     arraycopy(samp,leftChannel);
  }
  synchronized void samples(float[] sampL, float[] sampR)
  {
    arraycopy(sampL,leftChannel);
    arraycopy(sampR,rightChannel);
  }  
}