Sound settings?

Hello all.
I have a 42pfl6606/k2 , actual firmware.
Some older TV shows or coming from an analog signal overemphasize the "S". Sound can be heard okay, but it is rather dissstracting when the actorssss are ussing any sss wordsss. I played around with the options, but found no setting that would soften this effect.

Do you have experience and suggestion what to try?
Thanks in advance
Wombelero

PS:
Question is related to sound settings, if I posted in the wrong forum I apologize please feel free to move.

Hi

maybe its the best you try to record that with a cam and share this Video with us.
Please also check if this is Happening on all Channels and share your Serial No.

Thanks
Thomas