New
#1
The other sound driver is for you to output your audio thru HDMI cable to your monitor's built-in speakers.
I usually see 2 on my computers, this HP 15-g029 Notebook I'm on now has both an AMD and a Realtek driver.
2 devices here.
Yes you will see two audio with the new digital video outputs, even if your DVI or HDMI does not have a audio channel on the connection for the cable.