g-devices.html#toc-Options-11">4.4.1 Options</a></h3>

<dl compact="compact">
<dt>&lsquo;<samp>reference_level</samp>&rsquo;</dt>
<dd><p>The audio reference level in dB. This specifies how many dB above the
reference level (+4dBU) is the full range of 16 bit audio.
Defaults to &lsquo;<samp>0</samp>&rsquo;.
</p>
</dd>
<dt>&lsquo;<samp>clock_video</samp>&rsquo;</dt>
<dd><p>These specify whether video &quot;clock&quot; themselves.
Defaults to &lsquo;<samp>false</samp>&rsquo;.
</p>
</dd>
<dt>&lsquo;<samp>clock_