Try disconnecting any audio headset (for example, Oculus) and all USB devices except the keyboard and mouse.
If that doesn't help, try renaming the entire folder C:\Users\Gaming PC\Saved Games\DCS.openbeta to any name. This will reset all your settings to the default level.
But it is important for us now to check whether the problem will be solved.
If renaming doesn't help you, you can return the user folder back.