Hi Nikgnomic,
I gave it a try - kernel 5.8 together with pulseaudio-git (v13.99) made it - sound and microfone work now with kernel 5.8.
Many thanks for your support!
Kind regards,
Deniz
P.S.: I had first to remove libao, fluidsynth, lib32-fluidsynth and manjaro-pulse - after that I could install pulseaudio-git - having installed pulseaudio-git I added libao, fluidsynth, lib32-fluidsynth and manjaro-pulse (seems to be a bug in the dependencies of pulseaudio-git).