/kbd> : Reset zoom.</li>
  <li><kbd>Mouse Wheel</kbd> : Zoom in/out.</li>
  </ul>
  <h2 id="caution"><a href="#caution" class="header-anchor"
  aria-hidden="true">Caution</a></h2>
  <p>Pressing <code>Refresh LFO</code> or <code>Refresh Table</code>
  button stop sound. They also stop all midi notes.</p>
  <h2 id="wavetable-specification"><a href="#wavetable-specification"
  class="header-anchor" aria-hidden="true">Wavetable
  Specification</a></h2>
  <p>Length of a wavetable is <code>2^18</code> samples.</p