pole/zeros from biquad coefficients.</span></div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno">   68</span>                <span class="comment">//</span></div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno">   69</span>                <span class="comment">// It can also be used to accelerate the interpolation</span></div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno">   70</span>                <span class="comment">// of pole/z