Im using Processing 2.0b2 so that I can use Javascript mode to run the below code. The code works fine in Java mode but not JS mode. I cant figure out why, can anyone help? 

The sketch is based on a post over at openprocessing which also does not work in JS mode. 

Thanks for any help in advance. The folder can be downloaded here.

2. /* @pjs preload="baseimg.png,colormap.png,0.png,1.png"; */
3. 
   
4. PImage prospMap;  //map image
5. PImage colorMap;  //colormap of the buttons (hidden)
6. PImage[] png; //array of images to correspond to colormap
7. 
   
8. color[] regionColor= {
9.   0xFFC4C4C4, 0xFF595959
10. };
11. 
    
12. color testcolor=0xFFFFFFFF;
13. 
    
14. 
    
15. void setup ()
16. {
17.   size(600, 300);
18.   smooth();
19. 
    
20.   prospMap=loadImage("baseimg.png");
21.   colorMap=loadImage("colormap.png");    
22. 
    
23.   png = new PImage[2];
24.   for (int i = 0; i< png.length; i++) {
25.     png[i] = loadImage(i + ".png");
26.   }
27. }
28. 
    
29. void draw(){
30. 
    
31.   background(prospMap);
32.   fill(0);
33. 
    
34.   mouseOver();
35. }
36. 
    
37. 
    
38. void mouseOver() {
39.   
40.   testcolor = colorMap.get(mouseX, mouseY); //get the color in the colormap
41.   println("0x"+hex(testcolor));
42. 
    
43.   for (int i=0; i<png.length; i++) { //if the color has a match in the color array,
44.                                       //show the corresponding png and data
45.     if (testcolor==regionColor[i]) {
46.       image(png[i], 0, 0);
47.     }
48.   }
49. }
50. 
    

I have a big MP3 - 508MB (its 8 hours long)

2. I would eventually like to see a waveform of the entire file. I can in Audacity and I can see that there are three significant sustained amplitude increases (audio is taken form a restaurant, so breakfast, lunch and dinner time). I would like to use the waveform to drive a vibration motor (im using Arduino for this). But instead of 8 hours, I want the waveform compressed into about 3 seconds. How do I get this waveform data in Minim? How do I compress it into 3 seconds? Am I making any sense?