I recently noticed whilst watching certain programmes that my arc ultra makes a strange metallic squeak type sound from what I believe to be the side speakers only playing certain frequencies. I watched buy now the shopping conspiracy on Netflix on my Bose soundbar in the bedroom and it sounded fine then I decided to watch it with my partner downstairs through the arc ultra and some of the background music had a strange high pitched metallic sound emanating from the side speakers. I have also noticed it on other programmes with background music or sound effects but just thought I was being paranoid. It almost sounds like some high frequency distortion. I have tried truplay enabled and without and it’s still there, connected to a Sony a80j using EARC and good quality hdmi cables. Has any one else noticed this or do I have an issue with my unit?