[PlanetCCRMA] Re: Greetings FC2 I got capabilities and jack working

[Fernando Pablo Lopez-Lezcano]

> > Do you get the same performance if you go down to lower latencies? You
> > are using jack with 1024x3, how about 256x2 or less? Any xruns in those
> > conditions? 
> 
> Jackstart doesn't start with periods <= 2.

Yes, I guess that is because of the yamaha card. 

> With the command line:
> /usr/bin/jackstart -d alsa -d hw -r 48000 -p 256 -n 3 -z &
> I get a bunch of xruns:
> **** alsa_pcm: xrun of at least 4.949 msecs 
> **** alsa_pcm: xrun of at least 0.223 msecs 
> **** alsa_pcm: xrun of at least 7.208 msecs 
> **** alsa_pcm: xrun of at least 3.039 msecs 
> **** alsa_pcm: xrun of at least 5.195 msecs 
> **** alsa_pcm: xrun of at least 2.589 msecs
> **** alsa_pcm: xrun of at least 3.065 msecs 
> **** alsa_pcm: xrun of at least 2.995 msecs 
> **** alsa_pcm: xrun of at least 2.490 msecs 
> **** alsa_pcm: xrun of at least 9.959 msecs 
> **** alsa_pcm: xrun of at least 4.684 msecs
> **** alsa_pcm: xrun of at least 4.494 msecs
> 
> Is the command correct?

Well, you are not using the "-R", so you are not running with realtime
priority (that is crucial to help avoid xruns). Could you try again with
"-R"?

-- Fernando