PSound mySound; 
 
void setup() { 
  mySound = loadSound("arigato.wav"); 
  mySound.loop(); 
} 
 
void draw() { 
  // Sets the volume to 0.0 (silent) when the 
  // mouse is on the left edge of the window 
  // and to 1.0 (maximum) when the mouse is on 
  // the right edge of the window. 
  mySound.volume(float(mouseX)/width); 
}