// Example by Krister Olsson

import krister.Ess.*;

AudioChannel myChannel;
FFT myFFT;

void setup() {
  size(256,200);

  // start up Ess
  Ess.start(this);

  // load "cell.aif" into a new AudioChannel
  myChannel=new AudioChannel("cell.aif");

  // we just want the level, so we pass nothing
  myFFT=new FFT();
  
  // start the sound looping forever
  myChannel.play(Ess.FOREVER);
}

void draw() {
  // set the background color to a shade of blue based on the level
  int bgdColor=(int)(myFFT.getLevel(myChannel)*255);
  
  background(bgdColor,bgdColor,255);
}

// we are done, clean up Ess

public void stop() {
  Ess.stop();
  super.stop();
}