Yep these devises are all about reducing noise not recovering lost or corrupted bits. I also tried the Pink Faun Lan filter and it didn’t make a difference on my main system but it did slightly improve my second system which also had optical filtering. Go figure, doesn’t always make sense logically and that is why you have to listen to one for yourself on your system. Especially if you are going to comment on a forum!
Next up the Smooth Lan per ozzy’s recommendation.