message: renamed CDN->build
diff: By accessing the envelope's current value, we can create responsive visuals that are directly tied to what is heard.
  <br><br>
  This sketch uses <a href="https://p5js.org" target="_blank">p5.js</a> for visual components and the
  - <a href="https://tonejs.github.io/CDN/latest/p5.Tone.min.js">p5 version of Tone.js</a>
  + <a href="https://tonejs.github.io/build/latest/p5.Tone.min.js">p5 version of Tone.js</a>
  which adds a p5 <code>preload</code> hook for buffer loading.
  </div>
  </div>
  