Those cables that come with players are usually bargain basement items though aren’t they, they should be replaced with superior items by anyone who is serious about sound quality. Is there an audible sound coming through the channels when you turn the trim up? Or is it just lights on the mixer?
One other question, what is the purpose of turning up the sample rate on the mixer if you’re plugging the units in through the line connection? Shouldn’t you be using the digital coax to take advantage of that sample rate?
Obviously there is some issue whereby the increased sample rate is adding some sensitivity to the sound, but it’s only apparent by doing 2 things that aren’t relative to each other? (Line input and digital sample rate) and if it’s not actually causing noise to come through the signal chain is it worth worrying about?
Just to add, it looks like you already created a thread about this 6 months ago? Any particular reason for restarting it?