="parameter">y_max</span>
         Maximum value for y axis, defaults to 1.
        </li>
        <li><span class="parameter">delay</span>
         Delay value, defaults to 0.1
        </li>
        <li><span class="parameter">attack</span>
         Attack value, defaults to 0.05.
        </li>
        <li><span class="parameter">decay</span>
         Decay value, defaults to 0.2.
        </li>
        <li><span class="parameter">sustain</span>
         Sustain value, accepts 0-1, defaults to 0.5.
        <