A secret "known by signal processing experts" or nonsense? Options

[adamdea]

http://www.wickeddigital.com.au/index.php/...eally-necessary
Sets out what is described as a White Paper by Marco Manunta of M2Tech. It contains the following passage (my emphasis)

"But there is something more. It’s known by signal processing experts, and absolutely not popularized amongst music lovers, that converting an analog signal into a discrete-time one (as it happens when converting from analog to digital) destroys the phase information in the two top octaves of the resulting spectrum. In a CD-standard digital recording, all phase information are lost from 5.5kHz up to 22kHz,"

Can any signal processing experts comment on whether this is true or not, and if so why. As a mere layman I am not able to understand why it even might seem be true.

[greynol]

Detection of phase differences between channels does not go away by virtue of using headphones. If anything it is likely enhanced.

While I entertain getting to the truth on this specific issue, I fear it's getting off-topic. Not like there is much more to say on the matter that is on-topic.

[mzil]

Detection of phase differences between channels does not go away by virtue of using headphones..

What goes away is the ability of the L and R waveforms to interact and constructively and destructively collide with each other in the air, causing a ripple effect in the overall frequency response of peaks and nulls, which he is pointing out may theoretically in some circumstances, he stated, be audible. At least that's what I got out of it, but I'm sure he'll explain if I was right or wrong.

It is on topic to the opening post's query regarding phase anomalies in the top octaves:

destroys the phase information in the two top octaves of the resulting spectrum. In a CD-standard digital recording, all phase information are lost from 5.5kHz up to 22kHz,"

Which ABK and I are in agreement was "not pretty numerically" in some of the very early CD players:

So even the old CD players with analog filters did have fairly well matched channels, and while what they did to phase was not numerically pretty, there wasn't any serious effect.

And which I also originally pointed out wouldn't be expected to be audible anyways, before he even joined the conversation:

Humans aren't very sensitive to phase in the very top frequencies anyways, so it wouldn't matter.