No sound in far cry 4 with steam/proton

Hi all, today I was very exited te learn that now steam lets you play far cry 4 with the use of proton.
This was never possible because uplay would not let me log in, but now I can!

The game runs great at 2560x1440, only there is no sound, just in the intro video of the game.
Now I have seen people running far cry 4 on youtube with lutris with sound, but I just cannot find how they did that.

Has anyone here any idea how to get this game working with sound on leap 15?