Making sound from an Image. But some problems!

Hello!

I wrote this code to make sounds according to the pixel colour value. I also want the pixels to be drawn simultaneously in sync with the sound.

Please help me as I'm pretty new to Processing

Link to the picture used http://theblackliberalboomer.com/wp-content/uploads/2013/01/President-Obama-Official-Pic-2013.jpg

PImage obama;

import ddf.minim.*;
import ddf.minim.ugens.*;

Minim minim;
AudioOutput out;
Oscil wave;

void setup(){

  size(612,612);
  obama = loadImage("obama.jpg");

  minim = new Minim(this);
  out = minim.getLineOut();
  wave = new Oscil( 440, 0.5f, Waves.SINE );
  wave.patch( out );
  noLoop();
}

void draw(){

  obama.loadPixels();
  //image(obama,0,0);


for(int x = 0; x<612; x++){
    for(int y=0; y<612; y++){

      int index = x+y*612;
      color c  = obama.pixels[index];
      //stroke(c);

      float amp = map( c, 0, 255, 1, 0 );
      wave.setAmplitude( amp );

      float freq = map( c, 0, 255, 110, 880 );
      wave.setFrequency( freq );

      stroke(c);
      point(x,y);
      //delay(500);


    }
  }
}