[PD] a/d/a and jackd alsa low-latency problems

julien.breval at tremplin-utc.net julien.breval at tremplin-utc.net
Mon Oct 18 18:09:06 CEST 2004


Hello

> What are A/D/A sync errors caused by?

I don't know, but you can avoid them running jack as USER and Pd as ROOT in 
order to set it to realtime mode with the "-rt" flag

% su
% password :
% pd -jack -rt

with this solution, I don't get A/D/A errors, except if I open/close Pd files 
(and some Pd sub-windows with graphic arrays or tables, for example)

> Also I seem to have plenty of spare time available when I run
> jackd (Thanks for the help by the way!) but I cannot fully
> utilize it. When I run:
> sudo jackd -v -R -d alsa -d hw:1 -r 48000 -p 32
> Alsa says it cannot allocate a buffersize of 32. 64 seems as
> small as I can go. How can I circumvent this?

which sound card do you have ? mine doesn't even have 32 smp as buffer size

did you try to use qjackctl ? it's a QT graphical interface for jackd I think.





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