Personal tools
You are here: Home → Linux → Pulseaudio and Jackd
 

Pulseaudio and Jackd

— filed under: , , , , ,
by Harald Hoyer — last modified Jul 19, 2008 10:22

Howto configure Fedora 9 to run pulseaudio and jackd at the same time.

How to setup Fedora 9 to run the Jack Daemon and Pulseaudio

As root

Install the required packages:

# yum install pulseaudio-module-jack alsa-plugins-jack jack-audio-connection-kit

Add yourself to the pulse-rt and jackuser  group.

# usermod -a -G pulse-rt,jackuser "<your username>"

Edit /etc/security/limits.conf:

@jackuser - rtprio 20
@jackuser - memlock 4194304
@pulse-rt - rtprio 20
@pulse-rt - nice -20

As your normal user

Create the pulseaudio start file ~/jack.pa:

#!/usr/bin/pulseaudio -nF
#
load-module module-jack-sink
load-module module-jack-source

load-module module-native-protocol-unix
load-module module-volume-restore
load-module module-default-device-restore
load-module module-rescue-streams
load-module module-suspend-on-idle
.ifexists module-gconf.so
.nofail
load-module module-gconf
.fail
.endif
.ifexists module-x11-publish.so
.nofail
load-module module-x11-publish
.fail
.endif

Relog to get the new group permissions and limits.

Kill the current pulseaudio daemon:

$ killall pulseaudio

Start the jack daemon (your parameters may be different):

$ jackd -R -P4 -dalsa -r44100 -p512 -n4 -D -Chw:0 -Phw:0

Start the pulseaudio daemon:

$ pulseaudio -nF ~/jack.pa

Now everything should work :) At least for me it does.

What next? See Professional audio with Fedora and join the Fedora AudioCreation SIG.

Document Actions
  • Print this
  • Hits: 009878
Left arrow Previous: tc-dsl.sh  

Correction and hint

Posted by Mads Kiilerich at Jul 19, 2008 10:23
Thanks.

[root@localhost ~]# usermod -a -G pulse-rt,jackaudio mk
usermod: unknown group jackaudio

Using jackuser as mentioned in the text works.

"Relog" seems to be short for "log out and log in again" (in order to let pam_limits read the new settings). Else you will get "cannot use real-time scheduling". But you can also just make a su to your self.

- and then rakarrack can be started ... ;-)

Re: Correction

Posted by Harald Hoyer at Jul 19, 2008 10:24
Thanks for the "jackuser" group correction.

some extras

Posted by pyrael at Jan 21, 2009 10:20
First off, thanks a million for this info!!

What I found in my search for a way to have jackd, qjackctrl and pulse "playing nicely together" on login for FC9 running Gnome:

in your home directory:
$ vi .pulsekill

#!/bin/bash
killall pulseaudio
jackd -R -dalsa -r96000 -p256 -n2 -D -Chw:0 -Phw:0 -s -i2 -o2 & ##
pulseaudio -nF ~/jack.pa

save it (<esc> :wq)

**NOTE: your jackd settings may be different, I use 96k most often and seems ok for pulse just make sure the & is left in in order for the last line to execute

$ chmod +x .pulsekill

then open qjackctrl
click setup and in the options tab uncheck the scripting boxes (we won't need them)
in the Misc tab, uncheck "Start Jack on application startup" and check the "enable system tray icon" or Start minimized if using v3.2

Save the setup and exit

in:
system>Preferences>personal>sessions:
Add a new task:
name it pulsekill and point it at ~/.pulsekill and save it
Add another new task:
Name it qjackctl and put qjackctl in the command textbox

log out and back in, and pulse should be killed, jackd started, jack.pa started, and qjackctl started (minimized if you have the option)

Again, thanks for the help and I hope this little extra info helps someone else ;)
this might work for other distros (I wouldn't know) post back if you try it!!

Pyrael

module-stream-restore

Posted by synapse at Aug 31, 2009 08:33
On fedora 11, use
'load-module module-stream-restore'
instead of
'load-module module-volume-restore'
in the given example.

Pulseaudio & Jack

Posted by Darkman at Nov 08, 2009 10:57
Hello,

first, I would like to say my comments on this topic. I am running 32 bit Fedora 11.
I did it following the procedure by Harald until the step of killing pulseaudio and
then I followed the procedure by Pyrael.
 
/etc/security/limits.conf was already set up as described, so I didn't have to do
nothing there
I made the file pulsekill as a normal file, not hidden (without the . in front).
Otherwise it wasn't possible to select it in the startup sessions configuration and
even writing the file name, it didn't seem to start.
And one question to Pyrael. In the file pulsekill:
jackd -R -dalsa -r96000 -p256 -n2 -D -Chw:0 -Phw:0 -s -i2 -o2 & ##
what is the purpose of the ## at the end of this line?
Also I had to add the following line to /etc/rc.local:
/sbin/modprobe snd-seq-oss
Otherwise, qjackctl complains on startup that it can't access ALSA MIDI or
something similar, but now it is okAy.

So, I did it, as described above. Well, it is a big step forward, but it still doesn't
work completely for me. When I boot up, jack is not started. If I start it hitting the
button in qjackctl, then I am starting Skype and it doesn't have sound.
Then I have to stop jack, restart skype and audio works again. The same is in Firefox.
On the other hand, when I have no other applications running, I can start jack and FOR
THE FIRST TIME I am able to hear sound from the till now so quiet application named
Rezound!! And Rosegarden also seems to work. It still didn't sound, but I don't know
how to make it do so :-) At least it starts without any errors.
So, why the hell everything can't work together, as it is doing in other OS?? Can you
PLEASE help me to make it work, if it is possible at all??

THANKS a lot!! This website is the only place, which provided some help!