or spec</p>
</dd>
<dt>ntap<span class="classifier">int, optional```</span></dt><dd><p>Constant number of tapers to average from
if &gt; 0  Constant value to be used
if None kopt used
if &lt;= 0 Use the kopt array instead</p>
</dd>
<dt>kopt<span class="classifier">ndarray, int [nf]</span></dt><dd><p>array of integers, with the number of tapers
at each frequency.</p>
</dd>
</dl>
<p><strong>Returns</strong></p>
<dl class="simple">
<dt>spec<span class="classifier">ndarray (nf,4)       </span></dt><dd><p>the spe