Digital audio noise from Asus PCE-AC68 wireless PCIe card

I have 2 PCE-AC68 wireless cards installed in 2 different computers, one in an Asus Z170-A mobo, the other in a Z170-Pro mobo. Both computers exhibit the same problem. When the wireless card is active, it generates a lot of static and pops in the audio channel. It is really noticeable when I do an internet speed test.
Asus recommended that I uninstall them, swap the cards and reinstall the drivers. I did that, and have installed the latest driver available from Asus for the card. Same...

Digital audio noise from Asus PCE-AC68 wireless PCIe card