Code error on SimplePlayback example #108

import processing.sound.*;

SoundFile soundfile;

void setup() {
  size(120, 360);
  background(255);

  // Load a soundfile
  soundfile = new SoundFile(this, "vibraphon.aiff");

  // Play the file in a loop
  soundfile.loop();
  
  mouseY = height/2; // Set initial value before using mouse in sketch window
}      

void draw() {
  background(255);
  
  // Map mouseY from 0.0 to 1.0 for amplitude
  //float amplitude = map(mouseY, 0, width, 0.0, 1.0);
  float amplitude = map(mouseY, 0, height, 0.0, 1.0); //< Corrected to height!
  
  println(mouseY, amplitude);
  
  circle(width/2, mouseY, 20);
  
  soundfile.amp(amplitude);
}