5.1 Surround problem on Windows 10 PC

I have many games on Steam , Origin, Uplay and everything works well …
The problem is only with Forza games ( Forza 6 Apex , Forza Horizon 3 and Forza motorsport 7 demo) I just get stereo sound…
I have tried Killer instict on windows 10 and 5.1 surround normally works…
Please help me…

There should be an option in the audio menu - select Home Theater. Not sure if this is in the demo audio options. Perhaps you have to enable a setting or two in your Windows audio settings in order for Forza to ‘recognize’ 5.1 surround.

I dont think there is home theater option in demo but as i told you i have Forza 6 Apex and Horizon 3 which are full games and the first thing i checked is the ingame sound options …Its not about it … Its probably about windows settings , but i dont know what exactly to do , as i said above i have over 10-15 games on steam , origin uplay and all work well with my logitech 5.1 speakers …

So guys as Forza motorsport 7 is already out i guess someone else has the same problem as me??

bump.

Sorry, out of ideas. Contact MS tech support on xbox.com.