On Thu, 2012-07-05 at 19:19 +0200, Kaj Ailomaa wrote:

On Thu, 2012-07-05 at 17:42 +0200, Stefan Thomas wrote:

...

Dear Kaj, thanks for Your help. I've installed the lowlatency kernel and I've also reinstalled qjackctl and pd, from the ubuntu repositorys. But I still do have the problem, that I don't hear any sound. I opened Your patch signal-example and I can see the "cables". But I can't hear any sound! I don't have the option "compute" audio. When I click DSP, nothing happens. Shall I install a newer or older version from source?

Sorry, this was supposed to go to the list..

As for alsa, I am a bit reluctant to say too much, cause I don't know how that works with pulseaudio. But, the example should work fine, given you have started jack and configured pd to use jack, as well as made sure they are connected.

If you have multiple audio devices (hdmi is an audio device also), you need to make sure the right device is selected in qjackctl -> Setup -> Interface. Other settings are fine as they are.

After starting pd, choose from the menu: Media -> jack. Make sure input and output are toggled on, and that you have set the number of channels (2 is fine). Click Ok.

Then, go to qjackctl -> Connect. If there are no wires between pd and "system", then select pd at one side, and system at one side, and hit connect. This will enable audio out. system->pd will enable audio in. You can expand the inputs and outputs with the little arrows next to the devices to see how many inputs outputs each contains.

That should be it.