In this case I put default, but I also did it with the both devices that appears, hw:0 or plughw:0, doesn't work as well. At this moment I started jackd by the terminal and after opened the QjackCtl and looks like is working correctly, with the settings as default. Thank you, it was by your advice that jackd was working by terminal that I did this way, at least is working, not by the regular way but is working. Thank you very much, JB PS- not completely solved but working <div class="gmail_quote">On 30 Mar 2016 5:01 p.m., "Kaj Ailomaa" <<a href="mailto:zequence@mousike.me">zequence@mousike.me</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On Wed, Mar 30, 2016, at 03:04 PM, Joao Bruno wrote: > <a href="http://picpaste.com/Screenshot_-_30-03-2016_-_13_50_29-GwYDHNJW.png" rel="noreferrer" target="_blank">http://picpaste.com/Screenshot_-_30-03-2016_-_13_50_29-GwYDHNJW.png</a> > In the picture above you have not selected a device. If you select the correct one, jack will start. Select the device from "Interface". If you absolutely want to use your hdmi output, instead of the analog one, you need to set "Audio: duplex" to outputs only. -- ubuntu-studio-users mailing list <a href="mailto:ubuntu-studio-users@lists.ubuntu.com">ubuntu-studio-users@lists.ubuntu.com</a> Modify settings or unsubscribe at: <a href="https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users" rel="noreferrer" target="_blank">https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users</a> </blockquote></div>