FYI - I had some high pitched hiss as well as other sounds when JonD was at his keyboard and had his cell phone on! If he moved closer to the keyboard all kinds of weird sounds happened. But when he backed away all we heard was a high pitched hiss. Note that his cell phone was in his pocket. He had to place his cell phone away from the keyboard.

I don't know if this is your problem or not but I thought that I should share this.

Good luck.

PS - also weird sounds will happen if your computer is close to your router. Been there - heard that also.

I just posted a selfie and all of the responses were get well soon!

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware