">    Enum of AudioParam::AutomationRate from the spec</span>
<span class="sd">    &#39;&#39;&#39;</span>
    <span class="n">A_RATE</span> <span class="o">=</span> <span class="s2">&quot;a-rate&quot;</span>
    <span class="n">K_RATE</span> <span class="o">=</span> <span class="s2">&quot;k-rate&quot;</span>

    <span class="k">def</span> <span class="nf">to_json</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="nb">str</span><span 