" Laptop->HDMI->Samsung TV optical out->Lampi or Schiit optical in. "
Justin; have you ruled out the possibility that the TV may be re-sampling the digital signal.
My TV (not a Samsung btw) does. Just a thought
"The hi-fi fraternity is bizarre, full of dangerous amateurs" Tim de Paravicini Audio Magazine 1995
"Objective measurements in audio are primary, but they are useless unless they have been subjectively validated as predictors of musical accuracy Edgar Villchur Stereophile 2005
" What we cannot measure, we do not know" Lord Rayleigh