ams, or do it through a graphical interface,
for example with <code>qjackctl</code>.
</p>
<p>To list the JACK clients and their properties you can invoke the command
<code>jack_lsp</code>.
</p>
<p>Follows an example which shows how to capture a JACK readable client
with <code>ffmpeg</code>.
</p><div class="example">
<pre class="example"># Create a JACK writable client with name &quot;ffmpeg&quot;.
$ ffmpeg -f jack -i ffmpeg -y out.wav

# Start the sample jack_metro readable client.
$ jack_metro -b 120 -d 0.