I briefly tried switching between an early scene of Aquaman dolby vision disc With Dolby vision,hdr without optimizer, than with. I still am going through the n950 sound bar. After a few brief tries I did not see a vast difference but it might be my imagination but I think I choose the hdr with optimizer on. I made no other adjustments than turn optimizer on. The picture seams a little richer and slightly more detailed to me. I definitely need to do a lot more testing, but it piqued my interest enough too order an additional cable so tomorrow I can split the video directly into the tv and audio into my Sb. Something I never thought of without Roberts suggested use of the optimizer with the 820/9000. Even tried it with the Netflix streaming app briefly, thanks Robert something more to test and play with.