pan>
        <span class="n">env_Y</span> <span class="o">=</span> <span class="n">comp_env</span><span class="p">(</span><span class="n">Y</span><span class="p">,</span> <span class="n">filt_len</span><span class="p">)</span>
        <span class="n">Y_spec_env_X</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">multiply</span><span class="p">(</span><span class="n">np</span><span class="o">.</span><span class="n">divide</span><span class="p">(</span><span clas