[Rosegarden-user] pulse audio & qjackctl autostart

[steve c. <ste...@gm...>]

I'm not always needing a full audiophile experience when I'm using
Rosegarden and frequently wish I could hear sound on a web page or use
some other non-jack aware sound app without all the bother of shutting
down jack to free up the sound card every time.

I also wanted to start regular old non-jack pulse after closing jack.

I found this page very helpful in getting pulse to run through jack:

http://www.harald-hoyer.de/linux/pulseaudio-and-jackd

However, since I pretty well always want to start qjackctl when I log
in, I wanted to setup qjackctl to start automatically minimized to the
system tray and to start pulse as a jack client. After a bit of
screwing around, I've managed to make this happen on my system.

Thought what I've figured out might be some help to others with
similar requirements.

First, of course, I had to add qjackctl to my startup programs
(Startmenu->System->System->Startup Applications on my OpenSuse11.3
system)

 The attached jpeg shows the relevant settings in qjackctl.

Execute Script On Startup:       killall pulseaudio
Execute Script After Startup:     sleep 15; pulseaudio -nF ~/jack.pa &
Execute Script After Shutdown: killall pulse audio; killall jackd;
sleep 5; start-pulseaudio-x11

Please note that this won't work properly without the two sleep
commands. In the first instance, pulse will try to start before jack
is ready for it, in the second pulse will start in time to be killed
by the killall command. Also that without the ampersand at the end of
the second command qjackctl will hang waiting for the script to return
control.

If I set qjackctl to start jackd automatically, sometimes it fails to
start and I have to restart it manually, but I find this to be a
problem with qjackctl in general, so I just have it set up to be
started manually.

The file ~/jack.pa is as follows. It only differs from Harald Hoyer's
in that I've changed module-volume-restore to module-stream-restore
because pulse was complaining about it being obsolete:

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

load-module module-native-protocol-unix
load-module module-stream-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