[PlanetCCRMA] and where is fedora core 6??
blindman jones
erleichda@gmail.com
Tue Dec 5 07:32:01 2006
On 12/5/06, Jason Russler <jason.russler@gmail.com> wrote:
> You're not using all that AIGLX stuff are you? that will destroy any chance
> of running in a low-latency mode.
not using it... I use dual screens, and have for a while... the
desktop effects won't work if you use xinerama... I read that I think.
I will have to see if I have anything loading up I am not using that
might be effecting the latency.
> How big is your JACK buffer? If you're
> just recording, is there any reason you couldn't just bump that up to
> something unreasonable like 1024 or even 2048 (not that I'd consiter that a
> "fix").
I went as high as 1024 and that brought it down a bit... but not
enough... I didn't go higher because I always ran the stock FC5 at 256
with no xruns. I figured if I had to go much higher it wasn't really a
true solution... as you said.
> For my part, latencies and X-runs have gone down since the switch
> from 5 to 6 using the stock kernel and limits.conf.
interesting. what sound card are you using? I have the 1010LT.
If you are having success, I will have to dig deeper to see if
something I have configured is effecting latency.
thanx!!!
later,
mjr
>
> On 12/4/06, blindman jones <erleichda@gmail.com> wrote:
> >
> > hello,
> >
> > I don't use my audio apps for creating music, I record live shows and
> > use Ardour+JAMin to master those recordings to CD. Purely a hobbyist.
> > So, heavy duty realtime was never a big issue for me. the rdt kernel
> > from ccrma worked great for me, the rrt locked up my Asus P4PE though.
> >
> > I had the ccrma apps on FC5 installed and eventually there were no new
> > ccrma realtime kernels coming out so I decided to try the most updated
> > FC5 stock kernel, 2.6.18-1.2200... the newest ccrma was
> > 2.6.16-1.2080... to my amazement, the FC5 kernel worked just as good
> > if not better and I worked with that for a long time. It had enough
> > realtime features in it to work perfect for me with the only xruns
> > being when I was completed exporting in Ardour, I would have an
> > xrun... but I only knew that cause I saw it there in the log... I saw
> > a single xrun at the time the export completed... I never had problems
> > when playing back or during actual export.
> >
> > So, when FC6 came out I was not so nervous about upgrading, because I
> > knew Ardour and JACK had moved to extras and JAMin would be my only
> > worry. I upgraded (actually I installed on a new harddrive) to FC6,
> > got the JAMin source rpm from ccrma and installed Ardour, JACK and
> > rebuilt a JAMin... btw, you must use the fftw/fftw-devel from extras
> > and not the fftw3/fftw3-devel found at rpmforge to rebuild the JAMin
> > src rpm on FC6.
> >
> > But once I got everything installed, the limits.conf file updated and
> > started JACK and fired up Ardour... no good... constant xruns and no
> > amount of fiddling would fix it. I got it where they were few and far
> > between... but I still got them and the output would get tiny jitters.
> >
> > So, I don't know if my succes on FC5 with ccrma apps BUT FC5 stock
> > kernel had to do with ccrma or the kernel or what. But the stock FC6
> > kernel + Ardour/JACK from extras is not working the same.
> >
> > Luckily, I left the FC5 installed on another drive, so I can reboot to
> > mix shows... but I like many of the FC6 features... so I will be
> > anxious to test out any realtime kernels you get made Fernando. Wish I
> > had more to offer, I am not a kernel hacker dude... but if there is
> > anything I can test for you, be sure to let me know I will do my best
> > to help.
> >
> > Thanks again for all your efforts.
> >
> > later,
> > Michael
> >
> > On 11/29/06, Fernando Lopez-Lezcano <nando@ccrma.stanford.edu> wrote:
> > > Hi all, I have started publishing a few packages for Fedora Core 6.
> > >
> > > NO, you should not jump to Fedora Core 6 right now, no reason to :-)
> > >
> > > There are currently _no_ low latency kernels yet, not reliable enough
> > > but getting there - as usual thanks to Ingo and other kernel gurus for
> > > their hard work! Just use the Fedora Core kernel for now and tweak the
> > > limits.conf file to be able to run apps with realtime privileges[*]
> > >
> > > Some of the Planet CCRMA packages have migrated to Fedora Extras, I'll
> > > try to make a list of that sometime (Jack, Ardour, Rosegarden4 and many
> > > others).
> > >
> > > To get started (if you want to try things) install this for i386 (all in
> > > one line):
> > >
> > > ----
> > > rpm -Uvh
> > >
> >
> http://ccrma.stanford.edu/planetccrma/mirror/fedora/linux/planetccrma/6/i386/planetccrma-repo-1.0-3.fc6.ccrma.noarch.rpm
> > > ----
> > >
> > > or this for x86_64[**]:
> > >
> > > ----
> > > rpm -Uvh
> > >
> >
> http://ccrma.stanford.edu/planetccrma/mirror/fedora/linux/planetccrma/6/x86_64/planetccrma-repo-1.0-3.fc6.ccrma.noarch.rpm
> > > ----
> > >
> > > Surf here for packages available:
> > > i386:
> > >
> >
> http://ccrma.stanford.edu/planetccrma/mirror/fedora/linux/planetccrma/6/i386/repodata/
> > > x86_64:
> > >
> >
> http://ccrma.stanford.edu/planetccrma/mirror/fedora/linux/planetccrma/6/x86_64/repodata/
> > >
> > > (you'll find snd-motif, snd-gtk, snd-utils, clm-sbcl, cmn-sbcl, etc,
> > > etc)
> > >
> > > It is a start...
> > > Enjoy!
> > > -- Fernando
> > >
> > >
> > > [*] you need to (carefully) edit as root /etc/security/limits.conf and
> > > add these lines if they are not already there:
> > >
> > > ---- cut here ----
> > > # or (default) allow everyone access
> > > * - rtprio 99
> > > * - nice -10
> > > * - memlock 4000000
> > > ---- cut here ----
> > >
> > > This will give any user permission to run apps with realtime scheduling
> > > and to lock up to 4G of memory.
> > >
> > > [**] but there are things that don't work yet (AFAIK) in x86_64, for
> > > example pd and friends, supercollider and who knows what else...
> > >
> > >
> > > _______________________________________________
> > > PlanetCCRMA mailing list
> > > PlanetCCRMA@ccrma.stanford.edu
> > > http://ccrma-mail.stanford.edu/mailman/listinfo/planetccrma
> > >
> >
> >
> > --
> > michael jones * erleichda archiving * usa
> > shivering is the first step towards your destiny.....
> >
> > _______________________________________________
> > PlanetCCRMA mailing list
> > PlanetCCRMA@ccrma.stanford.edu
> > http://ccrma-mail.stanford.edu/mailman/listinfo/planetccrma
> >
>
>
>
> --
> If there were in the world today any large number of people who desired
> their own happiness more than they desired the unhappiness of others, we
> could have paradise in a few years.
> --Bertrand Russell
>
>
--
michael jones * erleichda archiving * usa
shivering is the first step towards your destiny.....