^^ That.
The most confusing option is the "Realtek Digital Audio" alongside with "Realtek Audio" which is quite common in desktop computers. At first glance everything looks as it should, the eye easily skips the word "Digital" as the entire computer is a digital device, everything it does is based on digits.
With an USB headset that's not the problem, though, as they only show as one single device. But as Fugi said the sound can be switched to another soundcard. HDMI audio (Nvidia or AMD) gets my vote.