message: fixing envelope example
diff: @@ -433,7 +433,7 @@ export class Envelope extends ToneAudioNode<EnvelopeOptions> {
  * @example
  * const env = new Tone.Envelope(0.5, 1, 0.4, 2);
  * env.triggerAttackRelease(2);
  - * setInterval(() => console.log(env.getValueAtTime), 100);
  + * setInterval(() => console.log(env.getValueAtTime(Tone.now())), 100);
  */
  getValueAtTime(time: Time): NormalRange {
  return this._sig.getValueAtTime(time);
  