Am Mittwoch, 18. Oktober 2023, 13:16:32 CEST schrieb Greg Wooledge:
Hi Greg,

I get the same results as you got. So it is proven, that my system is in good 
condition and everything is well configured. This is an important point for my 
search! 

And no, this system is pure Debian (except that is been upgraded since many 
many years. I believe, the first installation was 2010 or so). 

Debian is so stable and reliable, so I did not need change much. Of course 
packages are uninstalled during that long time and things also changed (like 
alsa, then pulseaudio and now wireplumber / pipewire for example).

And as a carefull user, I purged old configurations (using aptitude purge ~c)

So, this is just clean Debian 12 stable. 

Hope, the vendor of the application will also have some hints. Fine is, I am 
now sure and it is proven, my system is set correctly. This is an important 
point for me.

Thanks for the feedback.

Best 

Hans

> On Wed, Oct 18, 2023 at 11:25:51AM +0200, Hans wrote:
> > I am in the group "audio".
> > 
> > correct:
> > 
> > /dev/snd = root:root , drwxr-xr-x
> > 
> > All others below /dev/snd are set
> > 
> > crw-rw--- = root:audio
> 
> It would help if you pasted the actual "ls -l" output.  Here's mine
> for comparison:
> 
> unicorn:~$ ls -l /dev/snd
> total 0
> drwxr-xr-x  2 root root       60 Oct  7 08:49 by-id/
> drwxr-xr-x  2 root root       80 Oct  7 08:49 by-path/
> crw-rw----+ 1 root audio 116, 10 Oct  7 08:49 controlC0
> crw-rw----+ 1 root audio 116, 12 Oct  7 08:49 controlC1
> crw-rw----+ 1 root audio 116,  8 Oct  7 08:49 hwC0D0
> crw-rw----+ 1 root audio 116,  9 Oct  7 08:49 hwC0D2
> crw-rw----+ 1 root audio 116,  3 Oct  7 08:50 pcmC0D0c
> crw-rw----+ 1 root audio 116,  2 Oct  7 08:57 pcmC0D0p
> crw-rw----+ 1 root audio 116,  4 Oct  7 08:49 pcmC0D2c
> crw-rw----+ 1 root audio 116,  5 Oct  7 08:50 pcmC0D3p
> crw-rw----+ 1 root audio 116,  6 Oct  7 08:50 pcmC0D7p
> crw-rw----+ 1 root audio 116,  7 Oct  7 08:50 pcmC0D8p
> crw-rw----+ 1 root audio 116, 11 Oct  7 08:50 pcmC1D0c
> crw-rw----+ 1 root audio 116,  1 Oct  7 08:49 seq
> crw-rw----+ 1 root audio 116, 33 Oct  7 08:49 timer
> 
> You see those "+" signs at the ends of the permission strings?  Those
> are super important here.  When you login to Debian, there's various
> black magic that happens with "session" and "seats" and so on.  One
> of the things involved in that magic is adding your account to the
> ACL on the audio devices.  For instance,
> 
> unicorn:~$ getfacl /dev/snd/hwC0D0
> getfacl: Removing leading '/' from absolute path names
> # file: dev/snd/hwC0D0
> # owner: root
> # group: audio
> user::rw-
> user:greg:rw-
> group::rw-
> mask::rw-
> other::---
> 
> 
> If yours isn't doing that, then we have a problem.  In fact, the very
> first thing I wondered when I read your post was "Is this actually a
> Debian system, or is it something like Devuan?"  If you've altered the
> login stuff, for example by trying to remove systemd, then you might
> have broken the session/seat magic that sets up the ACLs.




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