span class="lineno">   50</span><span class="comment"> * Base for filters designed via algorithmic placement of poles and zeros.</span></div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno">   51</span><span class="comment"> *</span></div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno">   52</span><span class="comment"> * Typically, the filter is first designed as a half-band low pass or</span></div>
<div class="line"><a id="l00053" name="l00053"></a><span cl