Hi I wanted to install jack an saw the tutorial https://frontpagelinux.com/tutorials/easily-install-jack-audio-with-ubuntu-studio-installer/.
There they discribe how to install jack by installing ubuntu studio installer on a official flavor of ubuntu.
Now I wonder if I could use the tutorial with kde-neon. I.e. how close is kde-neon to ubuntu?

Hello

Jack is part of Ubuntu(Neon). So you need no Special. I have it running on my system here with Ardour5.

Ok, thant sounds good
Did you have any problem with generic kernel?
You did not have to add any of what I added then?
I do not know If I had the whole thing.
I saw some components but I did not have the gui.
for all the noobs like me that reads this after:
I followed a some tutorials and installed it like this:
1)
installed the low latency kernel
to use this syntax I get updates on the kernel, if choosing a specific one I would be stuck with that one:
sudo apt install linux-lowlatency
reboot check what kernel you are using:
uname -r
2)
Add yourself to group group that can have real time processing privileges.
The default is to use the group name audio but if it exist you should choose an other.
I had a audio group before but I still used it, read about it here:
check the manual here: https://jackaudio.org/faq/linux_rt_config.html
for instructions.
3)
create and edit the file /etc/security/limits.d/audio.conf
add the 2 lines below to it:

@audio - rtprio 95
@audio - memlock unlimited

4)
install pulseAudio -jack module
sudo apt install pulseaudio-module-jack

5)
install kxstudio repositories:
https://kx.studio/Repositories
gdebi can install downloaded .deb files. use it to install the .deb file that contains the repositories.
sudo apt-get update

6)
install Cadence from the repository

To use jack:
use pulsaudio volume control to choose outputs for your program
pavucontrol

use Cadence>Catia to wire between sources and output.
To add sinks and sources to connect programs to use:
pactl load-module module-jack-sink client_name=NameOfSink
pactl load-module module-jack-source client_name=NameOfSource