Linux record `monitor of `

hello community,

i am trying to follow this tutorial:
https://manual.audacityteam.org/man/tutorial_recording_computer_playback_on_linux.html
but at the point of

  1. In the “Capture from” dropdown, select the “Monitor” option of the playback device used by the application you want to record from, as shown below:

i am failing:
the selection of any other than the two microphones is not possible -
it just does not switch to the clicked source but stays on the last selected real mic.
i have no idea what the real problem here is…
my obs is working fine with the monitor devices…

i have


it makes no difference what i select there…

i also tried the audacity-linux-3.4.2-x64.AppImage
there i see only pulse& default
but no difference in behavior in pavucontrol…

any tips are welcome

sunny greetings
stefan

system information

The Build
Program build date:
Jun 16 2023
Commit Id:
No revision identifier was provided
Build type:
CMake Release build (debug level 1), 64 bits
Compiler:
GCC 12.3.0
Installation Prefix:
/usr
Cache folder:
/home/stefan/.audacity-data
Settings folder:
/home/stefan/.audacity-data
Data folder:
/home/stefan/.audacity-data
State folder:
/home/stefan/.audacity-data
Core Libraries
wxWidgets
(Cross-platform GUI library)
3.2.2
PortAudio
(Audio playback and recording)
v19
libsoxr
(Sample rate conversion)
Enabled
File Format Support
libmpg123
(MP3 Importing)
Enabled
libvorbis
(Ogg Vorbis Import and Export)
Enabled
libid3tag
(ID3 tag support)
Enabled
libflac
(FLAC import and export)
Enabled
libtwolame
(MP2 export)
Enabled
QuickTime
(Import via QuickTime)
Disabled
ffmpeg
(FFmpeg Import/Export)
Enabled
gstreamer
(Import via GStreamer)
Disabled
Features
Nyquist
(Plug-in support)
Enabled
LADSPA
(Plug-in support)
Enabled
Vamp
(Plug-in support)
Enabled
Audio Units
(Plug-in support)
Disabled
VST
(Plug-in support)
Enabled
LV2
(Plug-in support)
Enabled
PortMixer
(Sound card mixer support)
Enabled
SoundTouch
(Pitch and Tempo Change support)
Enabled
SBSMS
(Extreme Pitch and Tempo Change support)
Enabled
Operating System: Kubuntu 23.10
KDE Plasma Version: 5.27.8
KDE Frameworks Version: 5.110.0
Qt Version: 5.15.10
Kernel Version: 6.5.0-14-generic (64-bit)
Graphics Platform: X11
Processors: 16 × Intel® Core™ i9-9980HK CPU @ 2.40GHz
Memory: 31,1 GiB of RAM
Graphics Processor: Mesa Intel® UHD Graphics 630
Manufacturer: ASUSTeK COMPUTER INC.
Product Name: ZenBook Pro Duo UX581GV_UX581GV
System Version: 1.0

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