I see. The active vs passive DP to HDMI adapter is a confusing topic. I read that DP++ port is so common now that vendor does not have it labeled specifically any more.  You can not find that info in Dell tech spec either.  Active adapter is not cheap.  Do you have another pc that has native HDMI video out to test your ASUS? ASUS call this line of monitor VA24E series.  Can you check out this manual and identify the exact model of your ASUS in this series?  it seems VA24EHLB/VA24EHL have audio line in.  VA24EHE and VA24EHEL do not.Did you connect an audio cable between pc and your ASUS as suggested by the manual?  P.14/32 [URL]
I have a 7070 MFF with 3 DP outputs. I'm using an adapter to connect an Asus VA24E monitor (which only supports HDMI but not DP). No matter what I try I cannot get audio from my monitor, even when I select ASUS VA24E (Intel Display Audio) as the output device in Settings/Sound (Windows 10). I've tried three different HDMI cables but I only have one DP to HDMI dongle so I'm guessing it may be my problem. BTW I've also tried connecting to all three DP ports on the 7070 but no luck. Is there a different type of adapter I should look for? I've read about active VS passive adapters but I could really use some advice at this point.
Optiplex 7070 MFF DisplayPort to HDMI adapter but no audio?