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?
2012/7/4 Kaj Ailomaa <[email protected]> > On Wed, 2012-07-04 at 08:20 +0200, Stefan Thomas wrote: > > Dear Iain, > > I did as You suggested, the problem remains the same. > > One problem might be: > > When I reinstall PD some of the other PD-related packages will be > > reinstalled to. > > But I've read in the meantime, that my problem could be a bug, related > > to my version of PD. > > It seems to be the same problem like the one, I have read on this > > site: > > http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=645041 > > > > Yep. It seems to be a bug with that release. > > I've added an example as an attachment. Should be enough to check if > everything works. > > Alsa works for me, but it doesn't work well at lower latencies. Jack is > preferred for that. > Only, to get lower latencies with jack, you'll need to install > linux-lowlatency (low latency capable linux kernel) and set up realtime > privilege (all this is done if you installed Ubuntu Studio). > > To set up realtime privilege, you'll need to do a few things. > > First, install linux-lowlatency: sudo apt-get install linux-lowlatency > > Second, you need to answer yes when asked about this when installing > jack. If unsure, see that the file /etc/security/limits.d/audio.conf is > not named /etc/security/limits.d/audio.conf.disabled. To rename it, do > this in a terminal: > sudo mv /etc/security/limits.d/audio.conf.disabled > /etc/security/limits.d/audio.conf > Inside that file, you need to have these two lines uncommented (they > should be by default): > > @audio - rtprio 95 > @audio - memlock unlimited > > If the file doesn't exist, just create it: sudo nano > /etc/security/limits.d/audio.conf > ..and add the two lines above. > > The third thing to do is to add yourself to audio group: sudo usermod -a > -G audio $USER > > Then, reboot. > > Latency is adjusted separately for both jack and pd. I believe jack > handles audio latency when used with pd, while pd handles its' internal > data latency. > Good latency for me is 64 frames/period in qjackctl settings, and around > 5-10 ms in pd jack settings. > > > |---------------- > [email protected] > ---------------------| > > _______________________________________________ > [email protected] mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list > >
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