Hi, on linux (arch) it's not possible to activate digisound.
Any ideas?

A couple of years late on reply, but if anyone else has this issue, the solution is to install the 32 bit packages for pulse or pipewire.

So if you're using pipewire, install lib32-pipewire and lib32-libpipewire and you should be good to go.

If you're gaming on Linux, the 32 bit libraries for sound and graphics are usually required.