2. import ddf.minim.*;
3. import ddf.minim.analysis.*;
4. import processing.opengl.*;
5. 
   
6. Minim minim;
7. AudioPlayer jingle;
8. FFT fft;
9. ArrayList<Boxy> boxes = new ArrayList<Boxy>();
10. //place your audio file in your sketch's data folder
11. String audioFile = "Kalimba.mp3";
12. 
    
13. public void setup() {
14. 
    
15.   size(screenWidth, screenHeight - 50, OPENGL);
16.   minim = new Minim(this);
17. 
    
18.   jingle = minim.loadFile(audioFile, 1024);
19. 
    
20.   hint(ENABLE_NATIVE_FONTS);
21.   hint(DISABLE_DEPTH_TEST);
22.   hint(DISABLE_OPENGL_ERROR_REPORT);
23.   hint(ENABLE_OPENGL_4X_SMOOTH);
24.   hint(DISABLE_OPENGL_2X_SMOOTH);
25.   smooth();
26. 
    
27. 
    
28.   fft = new FFT(jingle.bufferSize(), jingle.sampleRate());
29.   jingle.loop();
30.   for (int i = 0; i < 60; i++) {
31.     boxes.add(new Boxy(random(-150, 150), random(-150, 150), random(
32.     -150, 150), random(15, 30), color(10), color(
33.     random(0, 255), random(0, 255), random(0, 255))));
34.   }
35.   frameRate(30);
36. }
37. 
    
38. float angY = 0, c = PI / 300.0f;
39. float angX = 0;
40. PFont font = createFont("Calibri", 20, true);
41. float offset = radians((float) 1.5);
42. boolean toggle = false;
43. 
    
44. public void draw() {
45.   if (toggle)
46.     return;
47.   background(245);
48.   lights();
49.   stroke(0);
50.   drawMainAnimation();
51. }
52. 
    
53. ArrayList<Float> cubeSizes = new ArrayList<Float>();
54. 
    
55. public void drawMainAnimation() {
56.   for (int i = 0; i < boxes.size(); i++) {
57.     boxes.get(i).size = getSmoothedSize() + 10;
58.   }
59.   pushMatrix();
60.   translate(width / 2, height / 2, 100);
61. 
    
62.   if (!mousePressed)
63.     angY += c;
64.   rotateY(angY - offset);
65.   rotateX(angX);
66.   rotateZ(angY * 2);
67.   for (int i = 0; i < boxes.size(); i++) {
68.     boxes.get(i).render();
69.   }
70.   popMatrix();
71. 
    
72.   if (angY > PI)
73.     angY = -PI;
74.   textFont(font);
75.   fill(0);
76.   textFont(font);
77.   fill(0);
78.   text(audioFile + " - 0" + jingle.position() / 60000 + ":"
79.     + jingle.position() / 1000, 5, height - 15);
80.   text("Framerate: " + (int) frameRate, width - 130, height - 15);
81. }
82. 
    
83. public float getSmoothedSize() {
84.   fft.forward(jingle.mix);
85.   float cs = 0;
86.   for (int i = 0; i < fft.specSize(); i++) {
87.     cs += fft.getBand(i) * 10;
88.   }
89.   cs /= fft.specSize();
90. 
    
91.   if (cubeSizes.size() < 275) {
92.     cubeSizes.add(new Float(cs));
93.   } 
94.   else {
95.     cubeSizes.add(new Float(cs));
96.     cubeSizes.remove(0);
97.   }
98.   cs = 0;
99.   for (int i = 0; i < cubeSizes.size(); i++) {
100.     cs += cubeSizes.get(i);
101.   }
102.   cs /= cubeSizes.size();
103. 
     
104.   return cs;
105. }
106. 
     
107. //mouse drag rotates camera
108. public void mouseDragged() {
109.   angY = map(mouseX, 0, width, -PI, PI);
110.   angX = map(mouseY, 0, height, -PI, PI);
111. }
112. 
     
113. //pauses animation
114. public void keyPressed() {
115.   toggle = !toggle;
116. }
117. 
     
118. 
     
119. class Boxy {
120.   float x;
121.   float y;
122.   float z;
123.   float size;
124.   int strokeColor;
125.   int fillColor;
126. 
     
127.   public Boxy(float x, float y, float z, float size, int strokeColor, 
128.   int fillColor) {
129.     this.x = x;
130.     this.y = y;
131.     this.z = z;
132.     this.size = size;
133.     this.strokeColor = strokeColor;
134.     this.fillColor = fillColor;
135.   }
136. 
     
137.   public void render() {
138.     pushMatrix();
139.     fill(fillColor);
140.     translate(x, y, z);
141.     stroke(strokeColor);
142.     // noStroke();
143.     rotateZ(angY);
144.     box(size, size, size);
145.     popMatrix();
146.   }
147. }
148. 
     
149. public void stop() {
150.   // always close Minim audio classes when you finish with them
151.   jingle.close();
152.   minim.stop();
153. 
     
154.   super.stop();
155. }

http://www.projectfireball.com

all the source code is available to download from the website. There might be a few bits to change as it was made in an older version of processing. 

It might possibly be using the delay method in there somewhere which is now removed from the processing libraries because its terrible and should be burned and stamped on. Sorry went a bit off track there. 

Take a look at that site anyway. hopefully that will help. 

http://www.jaboston.com