I don't run the same kernel at work and at "play".
But here it is.
2.6.24.7-1.rt3.2.fc9.ccrmart


I think I have narrowed it down to ZynAddSubFX
It's the synth I use most. But I have just done something relatively
complex usng QSynth instead, and effects from Muse instead of the synth,
ad the problem did not occur.


On Wed, 2008-09-17 at 10:38 -0700, Fernando Lopez-Lezcano wrote:
> On Wed, 2008-09-17 at 07:04 -0400, Pat wrote:
> > I am running the latest ccrma RT kernel for FC9
> 
> Could you please type "uname -r" and send the result? I don't know if
> you are using the testing kernel or the stable. 
> 
> > I have tried numerous settings in various combinations
> > Right now, I think I have.
> > Priority, manually set to 89
> 
> Nope, don't change the priority. It is tuned for best performance. I
> think 89 will put jackd over the hardware interrupts from the soundcard
> and then you will have problems. 
> 
> > Frames/Period 1024 (I have tried 512)
> > Sample rate 44100
> > Periods Buffer 4 (i have tried 3-4-5-6-7, makes no difference)
> > Port Max 64
> 
> This should not make a difference.
> What is the output from the jack command line that I sent you?
> 
> -- Fernando
> 
> 
> > timeout 500
> > Audio: output only
> > Start delay 1 sec.
> > 
> > Realtime or not makes no difference.
> > 
> > 
> > Fernando Lopez-Lezcano wrote:
> > > On Tue, 2008-09-16 at 14:47 -0400, Pat wrote:
> > >   
> > >> Here is my setup
> > >> Laptop Toshiba 8510p , Intel Duo 2.2Mhz
> > >> 2G ram
> > >> Fedora Core 9
> > >> External SoundBlaster MP3+ (S80270) or On-Board Intel chipset. (they
> > >> both do it)
> > >>
> > >> Planet.CCRMA.apps.i386-2007.11.22-1.fc9.ccrma everything updated.
> > >>
> > >> Now, here's my problem.
> > >> I cannot get the sound to stop dropping. Jackd only shows 40% use. Not
> > >> running realtime, no XRuns etc etc. 
> > >>     
> > >
> > > Hmmm, which kernel are you running? (uname -r to know). 
> > > How are you running jack? Exactly which options?
> > >
> > > For example:
> > >   jackd -R -d alsa -d hw:0
> > > would be the minimum starting point... what happens with those
> > > parameters?
> > >
> > >   
> > >> It should be fine.  I tried just
> > >> about every setting I could think of. I get it to work okay, but the
> > >> sound experiences constant tiny drops or gaps.
> > >>     
> > >
> > > What do you mean it works ok? If you have gaps it is not working
> > > right...
> > >
> > > -- Fernando
> > >
> > >
> > >   
> > >> If I record a song as a WAV file, I can open it in Audacity and see each
> > >> drop, which are fractions of seconds where the output just stops. I can
> > >> edit and remove the gaps, and everything sounds fine. But I can't do
> > >> this all the time. There must be a way.
> > >>
> > >> I've tried disabling APIC, changing priorities of processes for IRQ's
> > >> and applications etc etc. Nothing improves.
> > >>
> > >> Where should I be looking?
> > >>
> > >> Thanks.
> > >>
> > >>
> > >>
> > >>
> > >> _______________________________________________
> > >> PlanetCCRMA mailing list
> > >> PlanetCCRMA@ccrma.stanford.edu
> > >> http://ccrma-mail.stanford.edu/mailman/listinfo/planetccrma
> > >>     
> > >
> > >   
> > 
> > _______________________________________________
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> > PlanetCCRMA@ccrma.stanford.edu
> > http://ccrma-mail.stanford.edu/mailman/listinfo/planetccrma
> 

