I'm italian so sorry for my english.
I recived my surface pro 7 i5 8gb one week ago and I noticed immediately some audio pops when start audio notification (new email arrived, whastapp notification, skype call...just to give some examples).
I think the problem is DPC latency since my SP7 has high DPC latency peaks (measured with LatencyMon).
Unfortunately i had the same issue with my previous pc (DELL xps15) and it was terrible...Than i buy an asus ux580...zero problems.
Now.... again this...DPC Latency....kill me...
I reset my surface, I install all update, I disable "audio enancher" (miglioramento audio in italiano), but however DPC stay hight like the screenshot.
PLEASE MICROSOFT.... DO SOMETHINGS TO SOLVE THIS ISSUE.... PLEASE