Well, given your acknowledged hatred of everything not east of the Willamette, I now choose to blame you for this issue.
My buddy who was also hearing the issues lives around the Lloyd Center area, but I live in Cedar Mill.
It's not just on surround sound. My upstairs TV has had the same obnoxious screeching noise coming out of the built-in speakers the last couple games. It was so bad, I had to turn the volume all the way down and turn on the close captioning. Fuck Comcast. This is what happens when you let someone establish a monopoly - an inferior product at a premium price. BNM
I don't know whats worse, you typing what you did assuming I know where the hell that is or me NOT knowing where the hell that is.
It's northwest of the Hwy 26 (Sunset Hwy), 217 intersection. It's an historic area named for a lumber mill that used to be there back when the area was still forested. I only know this because my kids went to elementary school in the area and the local Quicky Lube (or whatever it's called) near Cornell and Saltzman had old black and white photos of the mill and forest before it became overrun by urban sprawl. BNM
Not sure if it's relevant as it sounds like the sound quality is universally shitty, but I currently live near PCC Rock Creek and have Frontier FIOS service. BNM
Technically, Cedar Mill is Portland (zip code 97229). You my be thinking of Cedar Hills, which is Beaverton. BNM