I tried connecting my PS4 to my monitor. Everything seems fine, except that I can't get sound. The HDMI is connected to the monitor and I have speakers connected to the tower. I tried playing with the settings in order to adjust the sound so that it is linked with the HDMI, but with no luck. Under "Playback," I only see "Speakers" selected with a green check mark. Then I also see 2 "NVIDIA Output" both with a red arrow pointing down. I see nothing else I can select.