R: Re: R: Audio issues in 10.04

[brian.coll...@alice.it]

If I understand correctly, KXStudio is not a distro. You need to install a 
distro (Ubuntu Studio is a good option, but others might work, I don't know), 
and then activate the additional repositories in synaptic manager and from 
there, install the items that you want.

You might start with Ubuntu Studio 12.04 (it has long-term support and lots of 
updates). Then from there, see what else you need.
Personally, I like how KXStudio interfaces with Ubuntu Studio. Two very good 
projects, imo..

brian




Messaggio originale
Da: thomas-fo...@orgis.org
Data: 17-set-2012 15.26
A: 
Cc: "brian.coll...@alice.it"
Ogg: Re: R: Audio issues in 10.04

Am Mon, 17 Sep 2012 14:12:40 +0200 (CEST)
schrieb "brian.coll...@alice.it" : 

> Hello Thomas,
> I use KXStudio on top of UbuntuStudio, but the 12.04 version.

I think there is some misunderstanding: I don't have the issues with
10.04 but with 12.04. But thanks for the pointer to KXStudio forum ...
I got confused with all that flavouring of ubuntu. I see that I perhaps
should not blame UbuntuStudio when I have a partial mix with KXStudio
(I just treated it as PPA to get current Ardour ... every 'buntu
install I do seems to need an assortment of PPAs to make it work ...
the hell of conflicting rpm repos for RHEL gives an acknowledging wink).

So, It seems I'm half-way between two flavours of 'buntu here? You
install ubuntu ... turn it into ubuntu studio ... then into
KXStudio ... 

I guess I have to test 2, er, 3 setups before continuing to bugger either 
project

1. roll-back of KXStudio stuff to vanilla UbuntuStudio,
2. do a full install of kxstudio-desktop-xfce, kxstudio-meta-audio ...
and finally, KXStudio-kernel-realtime
3. or do a short-track and just install the KXStudio kernel, which
might be better tested with the kxstudio JACK.

I have prepared a USB drive with AVLinux 6 for comparison ... let's see
if _some_ setup works. And then, I can figure out what 'buntu or not I
need to get a working recording box.


Alrighty then,

Thomas

PS: Won't UbuntuStudio 12.04 integrate future 2.8.x Ardour releases?
It's all about bugfixes. And Ardour has lots of those. It just doesn't
feel right to work with 2.8.12 when there is 2.8.14 . Even if the new
version introduces new ones, it is one step closer to the illusive
2.8.FINAL that finally does not crash during mixing. It's a fine
tool ... it just should never crash. We should not let web browsers set
the standard for application stability:-/
But well, I guess the solution is to go KXStudio right away, which
seems to provide current versions of things.



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R: Audio issues in 10.04

[brian.coll...@alice.it]

Message: 2
Date: Mon, 17 Sep 2012 10:52:51 +0200
From: Thomas Orgis 
To: Ubuntu Studio Users Help and Discussion

Subject: Horrific jackd xrun behaviour after upgrade from US 10.04 to
12.04
Message-ID: <20120917105251.1214a...@orgis.org>
Content-Type: text/plain; charset="us-ascii"

Hi,

the subject says it all ... I had an install of 10.04 that worked. Only
issue seemed to be instability when recording while a USB drive is
connected. So, considering that perhaps this is a sign to replace a
mainboard with broken onboard USB (used a PCI add-on card, which might
have worsened the interrupt situation), I did replace it and the
machine worked fine during a session.

Now with the fully replaced hardware (Asus AM3 board with 780G chipset,
Athlon || X3 460, 8 Gig of Kingston DDR3 ValueRAM, 250 G Seagate SATA
boot, 2 WD EADS on mdraid for recordings and not to forget VIA firewire
on PCI-E (same card as before)) and the update to ubuntu 12.04 (yes,
should have tested the final hardware with 10.04 first, eh?), the
performance is hindered by jackd not being able to keep steady without
generating xruns at a some rate. Not really constant rate, though, also
its behaviour depends on client connections (even when just connecting
meterbridge, this seems to help triggering xruns a lot).

A very interesting fact is that using 3x512 periods (or bigger) is less
stable even than going down to 3x32! With big periods, I get xruns
right away, while with the low setting, I was able to get an hour of
recording done, but that ended prematurely -- I _guess_ that this was
because of some software glitch (like xrun handling) and not due to the
bass player nudging the keyboard by chance. But I cannot be sure about
that.

Now, I do have the lowlatency kernel already installed, also fresh
jack/ardour from kxstudio ... have rtirq setup updated by dpkg
(firewire in there instead of ohci1394). What are the ubuntu studio
folks' thoughts on this? Did you encounter _more_ stable jack with
extremely low latencies? But since it is not really stable and
glitch-free in any config, this interesting characteristic does not
help. Oh, and it happens independent of cpufreq governor. I do use XFCE
and the integrated radeon with open source driver.

Any help on getting that setup stable again is appreciated ... or
should I simply go back to 10.04 (and hand-install current ardour/jack,
as I did before)? I figure that I shouldn't even need a lowlat kernel
for getting basic 3x512 recording work!


Alrighty then,

Thomas.


PS: Why upgrade at all? Well, I have always a spark of hope that some
iteration of the GNU/Linux audio ecosystem will be really stable,
without random crashes of Ardour, for example. But I guess one has to
live with crashing multimedia apps ... not been that different during
my days doing video with Ulead Media Studio on Windows (and the fact
that version 5 was less usable than 2.5).
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End of Ubuntu-Studio-users Digest, Vol 65, Issue 11
***

Hello Thomas,
I use KXStudio on top of UbuntuStudio, but the 12.04 version. I haven't had any 
of the problems you mentioned at all.
You might want to post your question on linuxmusicians forum here: 
http://linuxmusicians.com/viewtopic.php?f=47&t=8012
I think you'll get more specific help with KXStudio there..

brian

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