Kubuntu 10.10 and real-time kernel

Alexandros Bitoulas albitoulas at yahoo.gr
Sun Feb 27 13:00:43 UTC 2011

> On Sat, Feb 26, 2011 at 2:16 PM, Alexandros Bitoulas 
<albitoulas at yahoo.gr>wrote:
> > Hello everybody!
> Hi Alexandros!
Hello Scott, thanks for your reply!

> > I run kubuntu 10.10 with 2.6.35-25-generic kernel and I am very pleased
> > and enthusiast about it's aesthetic feel.
> > 
> > However, I want to record live my guitar. With this kernel, the latency
> > that I
> > get in Jack, (with 512 frames/period, 44100 Sample Rate and 2
> > Periods/Buffer)
> > is 23.2 msec which is a little bit annoying. If I lower the Frames to 256
> > I get 11.6 but I have many Xruns.
> it would be helpful to know what you audio interface is to perhaps help you
> get better performance.

My on board card is (if I run lspci:) 
00:09.0 Audio device: nVidia Corporation MCP73 High Definition Audio (rev a1)

And to record my guitar I have recently bought this (cheapest) T.BONE USB-1G
where with lsusb I take:
Bus 002 Device 005: ID 0d8c:0008 C-Media Electronics, Inc.

Since I am new with (ubuntu) audio/studio software and hardware, I do not know 
how to further appreciate and make use this information with regard to your 

Any further comments or thoughts on that are more than welcome! 

> Also, in some cases (and yours might be one) if you add the user to the
> 'audio' group it helps performance as well.

Should I add my user name to the 'audio' group even with the 2.6.35-25-generic 
kernel, or you are referring to the case that I install the realtime kernel?

> > So, I am thinking to install the realtime kernel. The question is: are
> > Kubuntu
> > 10.10 and real-time kernel full compatible with each other? Do I need to
> > make
> > any considerations/modifications in my system before installing the
> > real-time
> > kernel. Did anyone had any problems with Kubuntu 10.10 and real-time
> > kernel?
> Good question.  But since it's all based on Ubuntu I wouldn't expect much
> deviation in performance except in specific, restricted cases.
> > I searched on the web and I only found some generic comments like "that
> > KDE isn't suitable for audio production", but with no serious support
> > that validate those comments.
> I think many people would argue with that position.
> A good friend created and maintains that KXStudio distro which is based on
> Ubuntu Studio and uses KDE.  It's brilliant and beautiful and includes a
> -realtime kernel I believe.  It's a live DVD so I would highly recommend
> researching it.  You can find it here:
> http://kxstudio.sourceforge.net/

Well, to be honest I don't feel the need to migrate to another desktop 
environment currently, but yes I will give it a try researching it! Thanks! 

> > I am looking forward to your replies and comments!
> > 
> > Thank you in advance,
> > 
> > Alex
> > 
> > --
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> ScottL

P.S. Scott, sorry for double sending this message, I forgot to c.c to the 
ubuntu-studio users list mail! 


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