I can't speak to the popping noise, and it sounds like some of that has been ironed out, but I was asked by @SurfaceSupport (on Twitter) to share my experiences in this thread, so here we go:
I have the Surface Book i7/512GB model, and received it on October 26th, after pre-ordering online on the day-of the announcement. Ever since I received it, I have been experiencing a very odd and frustrating buzzing noise coming through the headphones, only when I have headphones plugged in, and audio is playing (or just completed playing). The buzzing happens even if have the device on mute (with audio playing, while muted). When I touch the screen, the buzzing changes frequency. I just spent several hours on the phone with Microsoft Support, and I'll be running some experiments and talking again with them tomorrow, but I'm at a loss here.
- I've tried two different sets of headphones and two stereo systems, and have determined that it is not the headphones at fault.
- I have tried all the headphones on multiple other Microsoft, Toshiba, Apple, Dell, Nokia, and Samsung devices here (I'm a software engineer, so lots of testing on other devices), and I don't have this issue on any of the other devices.
- I got a replacement Surface Book of the same model from a local Microsoft Store, came home today with it, unpacked it, updated all its software/firmware, and it is still buzzing.
- I've tried it with the power connector attached and detached, I've tried it with the clipboard attached and detached, and I've tried it with wi-fi turned off, all to no avail. The buzzing is still there.
So, those are my experiences. It seems like I'm getting interference from somewhere, but only with the Surface Book. Somehow, I must be acting like an antenna when I touch the screen, because it changes the buzzing. I hooked my Surface Book up to another computer and recorded the buzzing, and I also hooked the Surface Book up to a stereo system and captured video of me touching the screen and how it changed the frequency of the buzzing coming through the headphone jack.
I'm going to take it with me to a few different locations around here to see if there's some sort of localized interference (I did walk the perimeter of my ~0.25 acre property and heard the buzzing the whole time), but still: why only my SB and not any of my other devices?
A few people reported this issue on Reddit, but there's little to go off of there, so I'm hitting at all the sources I can right now. I love the Surface Book, but this buzzing is incredibly frustrating, especially when I'm trying to do any sort of audio work.
Oh, Microsoft powers that be, please hear my calls. And seriously, if this is some local interference issue that you guys can figure out, you are more than welcome to come set up shop at my house and figure it out. I'll even feed you and stock your beverages of choice.