Community Manager@Mirgreaf It's most likely an output issue given that it works from the motherboard, I would imagine that it has something to do with your mic and audio device being on the same wavelength so to speak. Try disabling your mic entirely to see if there is any difference to the sound in-game.
First thing to do is go through Microsoft's recommended troubleshooting steps for any sound issues: https://support.microsoft.com/en-ie/help/4026994/windows-10-fix-sound-problems
You can also troubleshoot your audio devices from the notification panel in the lower right of the screen. This will search for any issues and attempt to fix them.
Let me know how you get on.
Darko
