import ddf.minim.*;

Minim minim;
AudioInput in;

int i=0;

void setup() {

  fullScreen();
  println( "Start of setup():" );


  minim = new Minim(this);
  in = minim.getLineIn(Minim.STEREO, 800);
  println( "End of setup()." );
}

void draw() {

  float col = map (abs(in.left.get(i)), 0, 1, 0, 255);
  background(col*3);

};