the same with my spx 15. The microphone is not working, however it responds when knocking on the laptop. So I think the drivers are ok, but the hardware malfunctions. My laptop was returned for two months to repair after using it one week when bought. (I bought 3 years warranty!). Dell refused to hand over a new one. Before handed over to Dell 3 maintenance guys tried to fix it prior. My laptop is opened 4 time so I assume that the microphone is broken during one of those repair sessions. I noticed the problem of the mike however only later. Dell tried to fix the problem with driver updates en installations over and over. Cost me about 5 hours, but as I expected no success. The obliged me to reinstall a fresh windows. I am quite sure that does not help, and Dell refuse to repair the hardware. Problem is the software repairman only know how to reinstall drivers, the hardware repairmen only know how to use a screwdriver. There book says first to do a fresh windows reinstall and when problem still is there then the come for the hardware. A reinstallation is too much work. As a bonus I recieved a tick of 50 euro to buy a seperate mike from DELL. And now, icing the cake, the delivery time of the seperate mike was two month, but delayed with another month. So in Corona time I can't us this expensive XPS 15 2-1. I think this reply will give an answer to the many problems with the microphone in his forum, and to live with it.
