Hi,
I'm new on processing and I'm starting to create a simple sketch using ESS to make a cube react with the sound (see the code below).
Now the question is, how can I apply that Blur filter to just the drawCube() function instead of the whole sketch?
Because the rect's are being affected with the BLUR too. 
Quote: 
 
import krister.Ess.*;
import processing.opengl.*;
import javax.media.opengl.*;
// start
FFT fft;
AudioInput in;
int bufferSize;
float [] zoneFill;
int beat;
void setup(){
  size(532, 230, OPENGL);   
  Ess.start(this); 
  bufferSize = 1024;
  in = new AudioInput(bufferSize);
  fft = new FFT(bufferSize);
  fft.equalizer(true);
  in.start();
  // set up our FFT normalization/dampening
  float minLimit=.005;
  float maxLimit=.05;
  float myDamp=.1f;
  int numAverages=32;
  fft.limits(minLimit,maxLimit);
  fft.damp(myDamp);
  fft.averages(numAverages);
  zoneFill = new float[]{
    255.0, 255.0, 255.0    };
  noStroke();
}
// Maximum fft 1.0
// Minimum fft 0.0
// After init to Ess FFT demo that is
void draw(){
  background(242, 240, 174);
  noStroke();
  fill(color(131,104,81), 50);
  for(int i=0; i<bufferSize/2; i++) {
    rect(10+i,10,1,fft.spectrum[i]*200);
  }
  stroke(0);
//  pushMatrix();
  drawCube();
//  popMatrix();  
}
public void drawCube() {
  print((10*fft.getLevel(in)) + "\n");
  translate(250, 100, 3);
  rotateZ(radians(frameCount)+(1*fft.getLevel(in)));
  rotateX(radians(frameCount)+(1*fft.getLevel(in)));
  fill(color(100, 100, 100));
  box(35+(50*fft.getLevel(in)));
  // filter(BLUR, 2);
}
public void audioInputData(AudioInput theInput) {
  fft.getSpectrum(in);
}
public void stop() {
  Ess.stop();
  super.stop();
}