[PD] pd clicking with jack/linux

Derek Holzer derek at umatic.nl
Tue Jul 1 00:32:12 CEST 2008

I run PD as root (not sudo, but real root) for click-free operation. But 
Ubuntu has this weird thing where you can't be root, you can only sudo. 
Very strange... anyways, worth a try.

I also use fluxbox with very little else going on in the GUI. Spent 
almost a year tuning Linux to get really optimum performance for live 
gigs and recording situations, really the idea is that less is more. 
Ubuntu/Red Hat/SuSE etc just have too many processes (especially 
graphical ones that cause interruptions) running at once, IMHO.


patrick wrote:
> hi,
> i don't use pd-extended, but i think it's almost the same. the only 
> option missing is: -nosleep (useful for dual-core).
> so be sure in qjackctl - setup:
> Realtime
> Periods/Buffer: 2
> Sample Rate: 44100 (or more)
> Frames/Period: 256 (i am running at 64 without glitches)
> then for pd:
> pd -rt -jack -r 44100 -nosleep -audiobuf 256 -channels 16 -alsamidi 
> -mididev 1 etc...
> and finally, be sure to edit /etc/security/limits.conf:
> @audio          -       rtprio          99
> @audio          -       memlock         unlimited
> @audio          -       nice            -20
> and of course, add yourself to audio group (reboot to be sure). let us know.
> ah yes, a long time ago i was using icewm, because gnome was causing 
> glitches in pd. but now it seems ok here.
> pat
> Atte André Jensen wrote:
>> Hi
>> I get clicks and "DIO errors" at random intervals under linux/ubuntu 
>> with jack (no xruns). I have a 17ms latency setup with jack and a 
>> realtime patched kernel and the rest of my audio setup works great with 
>> jack.
>> I installed pd from Pd-0.40.3-extended-20080628-ubuntu-gutsy-i386.deb
>> Any one else running a similar pd with a similar setup and either have 
>> it working or experience the same problems?
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derek holzer ::: http://www.umatic.nl ::: http://blog.myspace.com/macumbista
---Oblique Strategy # 97:
"Is the style right?"

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