[LAU] ubuntustudio

[hollunder at gmx.at]

On Wed, 7 May 2008 14:59:54 -0400
"Geoff King" <gsking1 at gmail.com> wrote:

> >  On Tue, 2008-29-04 at 11:40 -0700, Florin Andrei wrote:
> >  > Malte Steiner wrote:
> >  > > On a new machine I thought I give Ubuntustudio a try and it
> >  > > seems that the lowlatency performance is much worse when the
> >  > > one of 64 Studio (booted from a live cd) on the same machine.
> >  > > So it needs some tweaking, are there any advices with
> >  > > UbuntuStudio? I read some past threads and they deal for
> >  > > instance with changing the priorities of jackd and the
> >  > > audioapplications but that improve the situation only
> >  > > slightly. I really wonder about the magic of 64 Studio... On
> >  > > the Ubuntuforums, which are a great resource even for Debian
> >  > > related stuff anyway, there seems no talk about lowlatency
> >  > > settings, it concerns only a minority.
> >  >
> >  > Why don't you go directly to the source?
> >  >
> >  > http://ubuntustudio.org/support
> >
> >  I imagine because he's hoping to get third party opinions? I am
> > too.
> >
> >  Iain
> >
> 
> I tried 64 Studio live cd a few months ago and had a similar
> experience.  I did get better performance with 64 Studio than
> ubuntustudio (gutsy at the time).  I'm currently using ubuntustudio
> hardy since I like the some of the other non-audio features it
> provides and share the computer with my wife.  But if you are truly
> into only audio and need the lowest latency, 64 Studio may be better.
> 
> I've done many tweaks to ubuntustudio to get it to do both jobs (from
> memory): -Install with the rtirq script (I think I got the package
> from either the 64 Studio or debian archives and had to change
> something to make it work). Learn about what this does.
> -Tried to uninstall or turn off programs that I don't use or need such
> as trackerd, bluetoothd, powernowd, apmd and acpid on my desktop.
> -Usual memory tweaks (shmmax)
> -Try not use artsd or pulseaudio and stick with jackd for most things.
> Turn off system sounds and select alsa as gnome audio resource.
> -Had to manually install the jack-alsa plulgin to get amarok to work.
> There is an ubuntuforums page about this.
> 
> Not sure which helped the most, but I get pretty good performance now.
>  There is a lot of information available, on the web, but it takes
> some trial and error to get it right.
> 
> Plus sometimes you just can't get the latency down really low
> depending on your hardware.
> 
> Good Luck, Geoff

Geoff, as you found out yourself, it's not easy to find good
documentation that really fits your system. I'm writing a kind of
starters guide for using jack on ubuntu studio
(https://help.ubuntu.com/community/UbuntuStudio/JackQuickStart). It's
very basic, since the goal is to get it up and running. A good tweaking
guide would be very welcome.

Best Regards,
	Philipp