ry</code> has to be explicitly used to properly decrement the reference counter when the factory is not needed anymore, that is when all associated DSP instances have been properly destroyed. </li>
<li>a unique SHA1 key of the created factory can be obtained using its <code>getSHAKey</code> method</li>
</ul>
<h4 id="savingrestoring-the-factory_2">Saving/restoring the factory</h4>
<p>After the DSP factory has been compiled, the application or plugin may want to save/restore it in order to save Faust to wasm 