adults typically can’t hear 16khz.
The pursuit of higher and higher resolution files is like chasing rainbows. This is why the law of diminishing returns kicks in hard for two channel purists. Do you know WHY audio shows are full of $50K amps and $100K speakers. That is what it takes to squeeze out the last "bits" of two channel resolution. I am firmly in the camp with Tomlinson Holman who states multi channel offers very great value. I use his Audyssey DSX codec which is channel based, incredible, especially with live recordings. In essence, add WIDE channels to your system BEFORE height channels. Object based Atmos is great but less than 10% of the available music out there is mixed in Atmos. Audyssey DSX is an upmixer:
As Mr Holman is quick to point out, any audio engineer confronted with the question, “what do you want to do with a higher bitrate?”; will always ask for more frequency range and more dynamic range because they don’t know what to do with more channels. "It’s a new paradigm." "Just to go to 192 KHz sampling rate to satisfy passing bats instead of human beings is pretty crazy, but adding channels is of very great value." (For those readers not terribly familiar with flying rodents, bats have an ability to hear ultrasonic frequencies, the kind you can reproduce with a 192 KHz sampling rate). In answer to the question what is 10.2? Mr Holman replies "It is as far as we can push the market without people thinking we are crazy."