PulseAudio and Ubuntu Studio 11.10

[Scott Lavender]

On Sun, May 15, 2011 at 3:27 PM, David Henningsson <
david.henningsson at canonical.com> wrote:

>
> Sources and sinks, yes. Well, they should show up in both PulseAudio and
> JACK - since it is a connection between JACK and PulseAudio you should be
> able to route it the way you want in both PulseAudio and JACK.
>
>
>
> If you have both Natty and the DBus version of Jack2, it should show up
> automatically. If you use Lucid, Maverick, or Natty with another version of
> Jack, you'll need one or both of terminal command(s):
>
>
> pacmd load-module module-jack-sink
> pacmd load-module module-jack-source
>
> ...depending on whether you want to link playback, recording, or both.
>
>
> --
> David Henningsson, Canonical Ltd.
> http://launchpad.net/~diwic
>

David,

Okay, did some testing tonight but had some trouble.

Since qjackctl has the wrapper script to suspend Pulse Audio I shied away
from it, although I realize that I could have called the binary directly and
skipped the script.  However, I did it from the command line.

Firstly, I checked the jack version [1], which appears to be correct as it
is jack2 and in Natty.

My first test was to start playing an .ogg file with Totem and then try to
start jack from the command line.  The result was that jack found the
hardware locked...Ptui!  Ubuntu pastebin isn't working, sorry for the wall
of text:

scott at natty-studio:~$ jackd -dalsa -dhw:1 -r44100 -p512 -n3
jackdmp 1.9.7
Copyright 2001-2005 Paul Davis and others.
Copyright 2004-2010 Grame.
jackdmp comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details
no message buffer overruns
no message buffer overruns
JACK server starting in realtime mode with priority 10
control device hw:1
control device hw:1
audio_reservation_init
Acquire audio card Audio1
creating alsa driver ... hw:1|hw:1|512|3|44100|0|0|nomon|swmeter|-|32bit
control device hw:1
Using ALSA driver HDA-Intel running on card 1 - HDA Intel at 0xfe9fc000 irq
45
the playback device "hw:1" is already in use. Please stop the application
using it and run JACK again
Cannot initialize driver
JackServer::Open() failed with -1
Failed to start server

Now, I reversed the process and start jack from the command line and then
try to start Totem with the .ogg file:

scott at natty-studio:~$ jackd -dalsa -dhw:1 -r44100 -p512 -n3
jackdmp 1.9.7
Copyright 2001-2005 Paul Davis and others.
Copyright 2004-2010 Grame.
jackdmp comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details
no message buffer overruns
no message buffer overruns
JACK server starting in realtime mode with priority 10
control device hw:1
control device hw:1
audio_reservation_init
Acquire audio card Audio1
creating alsa driver ... hw:1|hw:1|512|3|44100|0|0|nomon|swmeter|-|32bit
control device hw:1
Using ALSA driver HDA-Intel running on card 1 - HDA Intel at 0xfe9fc000 irq
45
configuring for 44100Hz, period = 512 frames (11.6 ms), buffer = 3 periods
ALSA: final selected sample format for capture: 32bit integer little-endian
ALSA: use 3 periods for capture
ALSA: final selected sample format for playback: 16bit little-endian
ALSA: use 3 periods for playback
^Cjack main caught signal 2
control device hw:1
Released audio card Audio1
audio_reservation_finish
control device hw:1

This started jack well but Totem refused to play the song.  When I ctl-c to
stop jack then Totem started up directly and began to play the song.


At this point I didn't try either 'pacmd' lines until I hear back from you
as it seems you expected this to work.  I realize, however, that there is a
real chance that I'm doing something wrong too :)


ScottL

[1] http://paste.ubuntu.com/608805/
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