On Sunday 24 February 2008, Jean wrote:
> Sound is something difficult to understand in linux. I would appreciate
> some help.
Yes it is. I wrote the book on Rosegarden, and I've been around here since
2002, but I was just ranting on another list about how I still feel like a
helpless imbecile when it comes to this sort of thing.
I think that's sad. Either I'm too stupid, or this is all too hard. My money
is on too hard.
> I now use ESD as my sound server.
Turning off any sound servers like ESD or aRts is a good starting point. In
my experience, they aren't worth the effort. While some applications won't
work without them, there are alternatives that work fine. For example, on my
setup, none of the native KDE movie players work, but MPlayer does, so I just
use that, and have MPlayer pipe its sound through JACK.
> There are other strange things (tm) regarding sound on my system, the
> only volume sliders working on my system are those from alsamixer and
> the one from kmix if I first select the masterchannel. I have no system
> sounds althought that seems someting common on kubuntu (althoudgh
> booting the live cd I have system sounds).
Mixers on Linux are another evil thing. Ubuntu Studio has QAMix, and that's
the best choice in my book. It isn't as pretty as some of the alternatives,
but it makes up for that by actually letting you control the things you need
to control in a repeatable and predictable way.
You said Ubuntu and then Kubuntu. It doesn't matter much, but it would be
nice to know which you are running. In either case, you can take advantage
of Ubuntu Studio by installing the ubuntustudio-audio package, and maybe some
others. I'm not sure what is in which package off hand. The box I'm typing
at started as Ubuntu Studio from DVD, and then I installed kubuntu-desktop on
it, because I really can't use GNOME. All kinds of mix-and-match
Installing ubuntustudio-audio is a good next step. It will get you a good
kernel and a number of useful applications. It might fix your realtime
configuration in /etc/security/limits.conf for free, but I'm not sure about
> Starting jack on the commandline gives: *error* Access of CD
> device /dev/cdrom resulted in error: No medium found
> Starting the Jack gui is not very helpful either:
> 17:47:30.756 JACK is starting...
> 17:47:30.756 jackstart -v -R -P10 -dalsa -dhw:1 -r48000 -p512 -n2
> 17:47:30.759 Could not start JACK. Sorry.
It's odd that it's trying to use "jackstart." That is obsolete. Try changing
it to "jackd" instead. That might not solve the problem, but it's another
> Any more info I can give?
Since this is all Ubuntu-related, you might consider taking it to the Ubuntu
Studio Users list, where you might find a real expert, instead of a hack like
me. No matter which flavor of Ubuntu you started with, the Studio packages
definitely ought to be able to improve your chances of experiencing success.
They are in the normal Ubuntu repositories now. MPlayer and friends are in
the multiverse repository, I think, but we can get to that in a bit anyway.
D. Michael McIntyre