p">):</span>
            <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="sa">f</span><span class="s2">&quot;Frequency = </span><span class="si">{</span><span class="n">frequency</span><span class="si">}</span><span class="s2"> Expected Frequency in [-1.0, 1.0]&quot;</span><span class="p">)</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">b</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <spa