   <li><a href="#gain" id="toc-gain">Gain</a></li>
        <li><a href="#excitation"
        id="toc-excitation">Excitation</a></li>
        <li><a href="#objects" id="toc-objects">Objects</a></li>
        <li><a href="#wave" id="toc-wave">Wave</a></li>
        <li><a href="#collision" id="toc-collision">Collision</a></li>
        <li><a href="#random" id="toc-random">Random</a></li>
        <li><a href="#string" id="toc-string">String</a></li>
        <li><a href="#oscillator"
        id="toc-oscillator">O