[ubuntu-studio-users] Audio pop/glitch/crackle issues

[mario buoninfante]

I think I might have found the issue

https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-5.13/+bug/1966066


On 04/12/2022 12:11, mario buoninfante wrote:
>
> Hi,
>
> Here's a bit more info and some updates.
> I'm running Xubuntu 22.04.1 with Ubuntu Studio (everything installed).
> I'm using a Focusrite Clarett 8pre USB as audio device running at 
> 96kHz sample rate, 256 sample buffer size and 3 JACK period.
> I'm fully up-to-date and the kernel is Linux 5.15.0-56-lowlatency 
> x86_64 (I think the kernel got updated in the last round of updates).
>
> In the last 2 days I unsuccessfully tried to do the following (in 
> non-particular order):
>
>  *
>
>     uninstall pipewire - too many dependencies, so I gave up on that
>
>  *
>
>     the combo
>
>      o
>
>         systemctl --user stop pipewire.socket && systemctl --user stop
>         pipewire.service
>
>      o
>
>         systemctl --user mask pipewire.service
>
>  *
>
>     re-install pulse audio
>
>   * in /etc/pulse/default.pa I added "tsched=0" to the line containing
>     "load-module module-udev-detect"
>  *
>
>     edit the files in /etc/pipewire/media-session.d adding:
>
>      o
>
>         session.suspend-timeout-seconds = 0
>
>  *
>
>     install pipewire-pulse
>
>  *
>
>     replace pipewire-session-manager with wireplumber
>
>  *
>
>     re-install pipewire-session-manager and remove wireplumber (this
>     is actually the last thing I tried, so now I don't have
>     wireplumber anymore)
>
>
> Nothing helped.
> Then, after using:
>
>  *
>
>     systemctl --user status pipewire pipewire-session-manager
>
> I realised I was getting 2 errors:
>
>  *
>
>     mod.rt: could not set nice-level to -11: Permission denied
>
>  *
>
>     spa.v4l2: '/dev/video0' VIDIOC_QUERYCTRL: Input/output error
>
> I fixed the former adding
>
>     |@audio - nice -20|
>
> to /etc/security/limits.d/audio.conf
>
> I didn't manage to address the latter though.
>
>
> The situation seems to have improved, not so much with streamed 
> audio/video, but with audio only (eg audacious) - it might be too 
> early to assess this though, since it was a late night move.
>
> I went from "totally unusable - glitches, pops and crackles 80% of the 
> played audio", to "getting pops and crackles sporadically".
> Still makes my system unusable, since I mainly record/mix/produce 
> music on my computer, but all improvements are welcome!
>
> With audio/video from the internet though (mainly YouTube via 
> Firefox), I'm still getting terrible performance out of this.
>
>
> Cheers,
> Mario
>
>
>
>
>
>
>
> On 02/12/2022 21:09, mario buoninfante wrote:
>> Hi,
>>
>> Recently I started having issues with the audio performance of my 
>> system (Ubuntu 22.04.1 LTS).
>> It seemed to have started after my last update.
>> Simply running "top" I noticed I have "pipewire" running and I was 
>> wondering if that could be the problem.
>> I don't know if that has always been installed as I never checked 
>> before today, but I found online that several people are having 
>> similar issues both on Ubuntu and Fedora.
>>
>> Any feedback/recommendation is welcome :)
>>
>> Cheers,
>> Mario
>>
>>
>>
> -- 
> ---
> musician, QA engineer, mental health first aider MHFA England
>
> https://isoneph.bandcamp.com/
> https://vdof.bandcamp.com/
> http://mbuoninfante.tumblr.com
> https://vimeo.com/creativecodingsalerno
> https://github.com/mariobuoninfante
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.ubuntu.com/archives/ubuntu-studio-users/attachments/20221209/e43af67e/attachment.html>