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<p>Returns 1st IIR coefficient (usually one) </p>

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<a id="a459116db7aa381281997f428f15334cf" name="a459116db7aa381281997f428f15334cf"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a459116db7aa381281997f428f15334cf">&#9670;&#160;</a></span>getA1()