rmalised spectrum band edge-frequencies, a 2 element vector
with values in range [0 1] where 1 corresponds to the Nyquist frequency (Fs/2).
Note: When no band frequencies are entered, <code class="docutils literal notranslate"><span class="pre">BandEn</span> <span class="pre">==</span> <span class="pre">SpecEn</span></code></p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">Logx</span></code>  - Logarithm base, a positive scalar (default: natural log)</p></li>
<li><dl class="simple