no">  139</span>&#160;  <span class="comment">/** Calculate the next sample, given an input signal.</span></div><div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;<span class="comment">  @param input the signal input.</span></div><div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;<span class="comment">  @return the signal output.</span></div><div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;<span class="comment">  @note Timing