Its saturating

I just buy again remastered version of FFX and here I am facing a surprising problem: The sound tends to saturate. I have a sound system in stereo, but audiophiles (+ 4,000 euros between the speakers, amplifier, DAC ...) and all games or other sources niquel pass! To say I made with exactly the same connection test on the PS3 version of the game that I have always, and there are no complaints. But on the PS4 version, the default sound is louder, and saturates as the poor quality MP3s. We're realizes quite easily in the opening, before the time you load the game (on the theme of Zarnakand). We feel the acute rating sizzle. We also realize when we go on the menu and it scrolls the cursor (even if it is less obvious.) I tried to connect my PS4 optical output, to see if it changed something , but nothing ...