Hi nicosalto,
As you may know (see
here):
RuneAudio runs on RuneOS, a custom built GNU Linux operating system, based on Arch Linux.
It is lightweight, and it has an ultra low latency. It’s multiplatform, optimized to run on multiple devices, and it aims for the best reasonable sound quality from each device.
So it's not Arch Linux, it is based on Arch!
RuneAudio is not a rolling release distro!
There are more than a dozen packages that are specially build for RuneOS.
Tons of configurations that differ from a normal Arch Linux installation.
So it is most likely that Rune Audio breaks after a system update with "pacman -Syu".
If you like to update RuneAudio see
here
Frank