Hi,
Replying to myself again.
After a reboot of my Pi4, RuneAudio suddenly stopped being able to power on the Pi.
So I downloaded RuneAudio again and flashed it to SD Card again.
I then rebooted the Pi4.
Out of curiosity, I enabled and Camilla DSP and looked at it...
Surprise surprise : it is now working as it should (at least taht does sound like it does).
Go figure
So I take it all back : Camilla DSP is indeed working
So I can enjoy Rune Audio on it's own.
Regards.
FRED