Its not new that jitter and clocks create variations, i accept that most people cant hear a difference, in general most recivers are so bad that it wont matter if its worse, and impossible hear the difference, who have a good acustic inviroment where you can benefit from a transparent audio system, the good thing seems to be that the cheapest HDMI cables sounds the best.
Ill also admit that its pretty much impossible to find a good transparent speaker these days, as they are all voiced to newer equipment who sounds pretty horible if you could actualy hear it.
Just be happy you cant hear a difference, your lucky enought to not know what your missing.
People who uses room EQ should not worry at all with anything, as there is no saving that mess.
It must be hard for you to step down from the know it all throne and give us all of your objective Audio and Video knowledge.
You seems to think that everybody else do not know what the real world looks or sounds like..
Is that a wrong conclusion of what you actually tells us with your quoted post here?
What kind of cables, equipment, EQ and prosessing is used to record the transparent music sources you are listening to? How many modern speakers have you tried, And have you actually understood how the human hearing/brain system works when testing blind / not blind etc.?
Have also done some testing with the Chroma Multiburst test picture you have used many times here to warn us about the Panasonic "back door" processing.
(have always looked at back doors as safety hazards in computer programs etc, not some unwanted steps internal in picture processing in a BD player...?)
I do agree with you in some of your findings, not sure how these ting actually correspond to the real world of watching 4K movies and not upscaled DVD and BD test pictures and text documents etc.
If you actually read and understand the purpose of this Chroma Multiburst test picture from the excellent Spears and Munsil HD Benchmark disk, you wold see that your -4 Chroma setting is making a drop in the intensity for the section with the thinnest lines for the highest frequency.
Here is also what Spears and Munsil explain for this pattern on the net.
Chroma Multiburst
This pattern is the equivalent to the Luma Multiburst pattern, but for chroma. Because chroma is upsampled when converting 4:2:0 YCbCr to RGB, in a sense every display scales this pattern, even a native 1080p display. In some cases the player scales the chroma vertically to produce 4:2:2 YCbCr, and then the display scales it horizontally while converting to RGB. Or the player may output RGB, in which case the player is doing the chroma scaling. For players that have different output options over HDMI, you can change them while viewing this pattern and see the differences in how the player and the display handle the chroma channel. The individual sine waves in the center of each burst should look even, with no color shifts or intensity shifts on either side of the peaks. The waves should look smooth and not posterized. If the display is a 720p display, it should be possible for it to show all of the bursts cleanly, though the thinnest lines may look somewhat uneven. If the last burst turns gray, it tells you that the display is scaling the image down in YCbCr, which produces a slightly lower quality image than converting the 1080p signal to RGB and then scaling it to the display resolution.
Here is two examples from my Panasonic ub900 player what the default 0 and -4 settings do to a more correct way of using this pattern.
If you look at how the Chroma Multiburst test picture is built and zoom on to some of the sections and see how the Panasonic scales and adds some noise around the edges, there is some different information in these bars in the trouble areas, so not sure if this is a problem in real life cinema use of these 4K BD players.
Have also noted you are telling us these 4K players from OPPO 203 and all the 4K Panasonics do not scale SD DVD to 4K very well, and you preferes the Xbox 1s. For me that is no problem at all. Stopped using DVD back in 2007, and when using BD and 4K in my setup, i prefer the Panasonic over Xbox 1S. The new tone mapping capabilities in the new 420 820 and 9000 players looks to be a winner for projector use when the projector do not have a good internl HDR tone mapping built in.
I Know you like the less sharp CRT projector in your "most critical setup" (Even modded CRT projectors can not even fully resolve a 1080P source do to their optics) and you do not like the razor sharp projectors of today, that fully resolved 1080p and higher.
My most critical setup is a old 9" CRT projector setup with custum videochain running 1080P 72fps, i sit about 3m from a 2,4m wide screen, and there is just quite a bit of difference in the presentation depending how the digital videochain is handeling.
The 4k OLED is however a good display to study behaviors on differnt patterns to better try understand it.
Here is an old CRT screenshot, it may not be a correct post in a Panasonic DP-UB9000 thread, but when talking about speaker transparency and HDMI cables etc, I think the ones that is not familiar with the CRT picture references here may have a look at typical high end modded CRT projector a standard Sony G90 CRT pictures compared to full HD source files.
Modded 9"Marquee
Standard Sony G90
BD Frame from Sin Sity 2
Projectors that actually can use 4K sources trough these players. with some HDR and a DCI-P3 Colour Gamut much wider than any SD DVD and BD with REC 601 REC 709
Here is another Screenshot example 4K Sony VW1000 vs BD frame vs MArquee (a little small picture file, but illustrates the CRT softness and short comings.)
From many of your postings it looks to me like most of these new 4K UHD disk players is not a good match for your preferences and in your best CRT Home cinema and HiFi systems, but do you think it may be a good match with your 4K Oled TV.