[LAU] using Jack an interface to ecasound

Bengt Gördén bengan at bag.org
Wed Jan 18 18:45:11 UTC 2017

Den 2017-01-18 kl. 17:25, skrev john gibby:
> Thanks, Edgar.  The only thing I am sure I've installed, since
> starting with AVL 2016 a few weeks ago, is ecasound.  Maybe jack1 came
> in with that...  on maybe jack2 did.

You should be able to trace that from the dpkg log files in /var/log


grep installed /var/log/dpkg.log  /var/log/dpkg.log.1 | grep jackd

zgrep installed /var/log/dpkg.log.[0-9].gz | grep jackd

> I don't really know which one AVL2016 comes with.  I am tempted to
> save the few files I've created since installing AVL2016, and just
> re-install it.  I'm a Linux newbie and I don't know how to check the
> packages, though I would like to learn more.  And I seem to have
> forgotten the admin user/pwd I specified, darn it.  A re-install might
> be good.
> Also, I'm tempted to switch to zita-lrx instead of ecasound, in the
> process of this reboot.  I've gotten pretty familiar with ecasound and
> it seems pretty nice as far as I can tell, but if zita-lrx is newer,
> better and offers more functionality, maybe it's time to switch.
> Does anyone know if AVL2016 comes with the old jack, or jack2?  Since
> qjackctl calls jackd, maybe AVL2016 comes with plain jack.  I would
> prefer to use jack2, but not if it will cause me a lot of trouble that
> I can't handle as a newbie...
> Thanks,
> John
> On Wed, Jan 18, 2017 at 6:49 AM, edogawa <edogawa at aon.at
> <mailto:edogawa at aon.at>> wrote:
>     Am 18.01.2017 um 08:19 schrieb john gibby:
>         Hi Chris et al,
>         Thanks so much... I thought I might be using jack
>         incorrectly...  So now I'm trying to use jack as explained by
>         Chris above.  Here's some output:
>         gibbyj at LinuxBVR:~/Downloads$ jackd -R -d alsa -d hw:2 -p 128 -n 2
>         jackd 0.124.2
>         Copyright 2001-2009 Paul Davis, Stephane Letz, Jack O'Quinn,
>         Torben Hohn and others.
>         jackd 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
>         JACK compiled with System V SHM support.
>         `default' server already active
>         no message buffer overruns
>         I am not sure what it means when it says 'default' server
>         already active.  I thought I had stopped the server with
>         qjackctl.  When I start it as above, and then start qjackctl,
>         qjackctl still thinks the server is stopped.  (Kinda wish I
>         had jack2, seems like it has better admin functions.)
>         Here's some more output; there's a jackdbus process; why is
>         that here, I thought that was jack2?
>          4611 gibbyj    20   0  813480  76580  56480 S   0.3  1.0 
>          2:08.47 qjackctl
>          4413 gibbyj    20   0  223540  17504  16136 S   0.3  0.2 
>          1:31.74 jackdbus
>          4611 gibbyj    20   0  813480  76580  56480 S   0.3  1.0 
>          2:08.48 qjackctl
>     `default' server already active: this simply means that jackd is
>     running already, which is jackdbus in your process list. To
>     control jackdbus there is a cli program called jack_control, but
>     possibly you cannot even stop it (by typing "jack_control stop" in
>     a terminal) as long as some other process uses it.
>     You really should check what jack packages are installed on your
>     system; jack1 has no jackdbus coming with it, but if you try to
>     start jackd via qjackctl it says it is jack1.
>     There is no way to have jack1 and jack2 installed on the same
>     system. actually it seems really strange that jackdbus is able to
>     run at all under this condition, maybe others know more...
>     jackdbus is a variant of jackd that can communicate via dbus. Once
>     one jack server is running any subsequent attempt to start a
>     second one will fail unless you set up for non trivial and
>     sophisticated use cases typical users don't need.
>     Looking at AVLinux 2016 I see it has been built anew from ground
>     up and offers to include the KXStudio repositories, did you by
>     chance install anything from there?
>     To me it seems your system is somewhat messed up, you really
>     should check thoroughly what packages are installed. I'm an
>     openSUSE user though and don't have much experience with debian
>     derived systems, so that's about all I can say.
>     Reading the JACK FAQ at jackaudio.org <http://jackaudio.org> might
>     be a good idea (to get an overview about how that ecosystem
>     functions).
>     Cheers, Edgar
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