[Jackaudio] Distorted sound after upgrade to Kubuntu 22.10

[Stephan Auerochs]

Hello,

I'm running Siduction (Linux), so I can't speak especially for Ubuntu.

I'm using a DAW within a virtual machine (QEMU/KVM), connecting audio 
with jack-net to the Siduction host, where jackd  (jack daemon) is running.
After Siduction introduced Pipewire years ago, my experience was that 
Pipewire grabs all (USB) ALSA devices, preventing jackd from accessing 
them directly. Pipewire only offers a jack API for jack clients, but it 
couldn't work with the jack-net client. My configuration was not working 
anymore, because jackd (and qjackctrl) was not involved anymore.

So I decided  to deinstall pipewire on the Siduction host, and run jackd 
as the main sound server again; within qjackctrl I configured jackd to 
access my Focusrite 8i6 directly. Additionally I installed 
pulseaudio-jack for non-jack-capable applications (alternative is to run 
pipewire on top of jackd, but I have not tried).
This works still as my low latency, distortion-free audio solution.

Not sure what the advantages of pipewire are; seems to aim on a 
multimedia (video?) all-in-one solution, but as far as it is not network 
capable it's useless for me. Also I'm not sure if the Pipewire team sets 
high priority on the jack API in the future.

If jackd is still available on Ubuntu, deinstallation of Pipewire may be 
a (radical) solution.

Regards



On 30.01.23 16:39, Happy wrote:
> Hello.
>
> Have you tried to changed the settings in qjackctrl, like buffer size 
> and such ?
> Ubuntu is transitioning to Pipewire , artialy in 22.04 and full in 22.10.
> Pipewire replaces the legacy jack (emulation)
> Maybe it is a reason  maybe not.
>
> I am, very worried to change to 22.10. my focusrite 18i20 Gen 1 
> suddenly has started to get many XRUN after 8 yeats w/o changing the 
> hardware.
> But it seems many people are happy with Pipewire. (even it may not 
> have tested much with externa hardware)
> One of the reason I have not transisition to 22.10 from 22.04
> Perhaps you can post on 
> https://linuxmusicians.com/viewforum.php?f=6&sid=d4592ee0b470220fdb6dfd188d0706c5 
> <https://linuxmusicians.com/viewforum.php?f=6&sid=d4592ee0b470220fdb6dfd188d0706c5> to 
> find solutions.
>
> Thanks
>
> -----Original Message-----
> *From*: Ulrich Grün <ulrich.gruen at gmail.com 
> <mailto:Ulrich%20%3d%3fISO-8859-1%3fQ%3fGr%3dFCn%3f%3d%20%3culrich.gruen at gmail.com%3e>>
> *To*: jackaudio at lists.linuxaudio.org
> *Subject*: [Jackaudio] Distorted sound after upgrade to Kubuntu 22.10
> *Date*: Tue, 3 Jan 2023 12:44:52 +0100
>
> Dear list members,
>
> I'm quite new to Jack and just subscribed to this mailing list.
>
> First, let me say a warm Hello to everyone!
>
> *Now to my problem.*
> Since I upgraded Kubuntu 20.04 LTS to 22.04 (and also to 22.10), the 
> sound I hear is distorted. Even when the sound source is very quiet, 
> the sound is distorted. As if somewhere, the input signal is way too high.
> I tried a few different settings in the Jack Audio Connection Kit, at 
> no avail.
>
> Of course, I did ample research at Brother Google and found seemingly 
> similar problems. The advice that was given there, was either not 
> applicable to my situation, or was far beyond my skills to actually 
> digg that far into my Linux OS (I'm a chemistry teacher at a Dutch 
> high school, not an IT professional ;-).
>
> Thus made me decide to ask for help here!
>
> My soundcard is a Focusrite Scarlett 2i2, The version of the software 
> is the following:
> jackd: 5+nmu1; jackd2 & libjack-jackd2-0: 1.9.21; qjackctl: 0.9.7-1
>
> Below that is the output of the Messages in QjackCtl. Maybe and 
> hopefully, that some skilled eye finds some occurring error ...
>
> Thanks in advance !!!
>
>
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