Ok, so I did a lot more testing with this. I think I can hear what you are talking about. On mine it is very faint, but there is a bit of line noise. I don’t think its related to the GPU load though…at least on mine it appears to be related to the brightness of the screen. Lots of whites and brights on the screen and I hear it faintly, but if I’m just in like…the Steamdeck settings screen with blacks and dark greys it disappears completely. I wonder if the OLED power draw is causing interference.

Got my LE on Friday, absolutely flawless.

No dead pixels, no crackling speakers, no problems with the headphone jack.