Sound Bug (only on DK's)

Hello Rejuvithorn! Thank you for your reply.

The problem still occurs with sound set to System Default.
The Scan+repair says no repair required. I’ve tried a fresh re-install
Intel say my drivers are up to date.

Here is a Twitch clip of the sound bug, It occurs around 1/2 way through the clip, Just so you get an idea of what I’m experiencing.

I also tried the CMD command, However I wasn’t sure what to do after that.
As previously mentioned this has occured for a few months now and is on Live and Beta.

I should also add, oddly, this only happens for me when I play a Death Knight or I’m in a group/Raid with one. Atleast, I’m 99% sure this is the case.

Many thanks for taking the time to help.