I bet I can't too. I don't use CD players so I don't keep up with that tech. But I do know that if a marker on the edge of CD affects the sound then there is a physical reason why. There are only so many possibilities as to how that might happen, so it may be possible to deduce the inevitable mechanism before it is fully accounted for in measured dye spectral properties.
Also, in case you missed the point, there are multiple ways to absorb near IR light. Various chemical compounds may be able to do it. Purple felt marker dye may have some oxide in it. Oxides are often used as pigments. Its not a far stretch to suspect what is rationally likely.
What we learn from people like Phineas Gage would seem to say the mind, as we think of it, is mostly some processing that goes on in the brain. So long as you are still alive, damage to your brain is very likely to affect your mind. Dysfunction of other bodily systems can also affect the mind, as can drugs. Thus the mind would appear to have a very physical basis.
https://en.wikipedia.org/wiki/Phineas_Gage
EDIT: It appears you aren't asking questions from wanting to know the answers. Rather you are using questions as rhetorical tools to promote your own preexisting beliefs. Its persistent and overused behavior like that on your part that contributes to getting you into trouble. When you don't like the answers, you get more and more agitated. If there is such a thing as a "I hate Geoff Kait forum," it is almost certainly of your own making.
It would probably be a case of "as you make your bed, so you must lie in it."
https://www.collinsdictionary.com/us/dictionary/english/made-ones-bedlie-in-it#:~:text=If you say that someone,unpleasant results of their action.
https://en.wiktionary.org/wiki/every_man_is_the_architect_of_his_own_fortune
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I'm solidly in that camp. I use high pass filters to filter out subsonic trash, and some sources have a a surprising amount.
It doesn't change the fact that the body and mind are affected by low and very low frequency sound. As far as I know that isn't controversial.
What is controversial is that certain low frequencies affect how we hear. The music was in the room all along, you just weren’t hearing it completely or accurately. Low frequencies (acoustic) have a boatload of medical applications, physical applications. But the mechanism for Herr Schumann’s frequency is a mystery. It isn’t audible and it doesn’t affect the sound waves in the room or in the audio system. So what’s the story, morning glory?
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