I have an XPS 13 9360 and experience random, short bursts of static and/or buzzing whenever I listen to music through headphones, regardless of the audio source. I don't use the speakers often enough to say whether or not they have the same issue. I already updated the audio drivers from Dell's website and it didn't make a difference.
Has anyone else experienced this and/or know of a solution? This computer is out of warranty.
Have you tried another set of headphones or plugged external speakers into the jack? It sounds like the jack is causing a problem or the headphone cable or plug is shorting. Have you tried the headphones on another device?
I ran some experiments with different headphones and I think I'm onto something: when I noticed the static earlier, my cell phone was always sitting right next to my laptop. I tried listening to music from my laptop with my phone in the next room and only noticed the random static bursts once in an hour-long period of listening. Previously I would typically notice several bursts of static during the same time period. This seems to suggest the cell phone is a factor, although I would have expected zero static with the phone in a different room, so something else may be going on.