@Override
  public void update()
  {
    time++;

    int currentAlphaKey = 0;

    for (int a = 0; a < alphaEnvelopeKeys.length-1; a++)
    {
      if (alphaEnvelopeKeys[a] <= time && time <= alphaEnvelopeKeys[a + 1])
      {
        currentAlphaKey = a;
      }
      System.out.println(currentAlphaKey);
    }
    alpha = alphaEnvelopeValues[currentAlphaKey]+
            ((alphaEnvelopeValues[currentAlphaKey+1]-alphaEnvelopeValues[currentAlphaKey])/
            (alphaEnvelopeKeys[currentAlphaKey+1]-alphaEnvelopeKeys[currentAlphaKey]))*(time-alphaEnvelopeKeys[currentAlphaKey]);
  }