If you start pd in sudo, you have to connect to jack in sudo mode. Thus start jack in sudo (or gksudo for qjackctl).
I advise to use an rt kernel too. See documentation of Ubuntu Studio.
On Tue, Oct 12, 2010 at 3:27 PM, Raphael Raccuia < rafael.raccuia@blindekinder.com> wrote:
Hi list, I tested Pd rt as I need low latency for a performance next week... It seems -rt flag doesn't have any effect. I measured Pd latency with jdelay, and always get 640 (@48000), so about 13ms (pd only)... lower I set buffer in jack (no less than 256), more DIO errors I get... and there are a lot! This setting works great with many application (Ardour...), with about 10ms (~15 really). So I would have ~25ms, which is acceptable, but too many DIO errors!
-what is -defeatrt setting? (I tried 0 and 1, no change) -why is -rt flag without effect? -tried nosleep, no change...
I also tried to start pd in root (sudo)...
It says: priority 8 scheduling enabled. priority 6 scheduling enabled. (which I normally don't have)
but unfortunately can't connect to jack (state 17)
thank's for your help
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