Hello I have an HP Envy m6 Notebook PC (m6-n012dx) and I actually got it several days ago. This has only happened to me while gaming, so it might happen outside of gaming to but it hasn't yet, but seemingly randomly the audio will start making a kind of screeching noise, I can tell the sound effects or music or whatever is running at the time will keep running, but very broken and slowly over the time the audio is doing this.
This computer is basically brand new and I got it from BestBuy, so I can still go have it replaced if I really need to, but I have everything set up as I'd like it so I'd rather not. All the drivers are also updated if you're going to tell me to do that.