Test him, and see if he is right. Then, if you have something concrete
to report come back and there will be something to talk about.
Everything technical you have written above tells us no more than that
you don't know how CDs work.

I probably know more about how CD's work than 99.99% of the population
since my honours degree in Physics contained a generous section on
optics, my secondary subject, Electrical engineering brought me into
daily contact with electronics, my post-graduate work in the Physics
department at Birmingham University and the Rutherford Laboratory in
Oxfordshire included daily use of lasers. I've owned CD players since
1982 (when the biggest problem was finding a CD, let alone knowing how
they worked).

But then what do I know? I'm just a Physicist with an electronics hobby.

--
Steve Swift
http://www.swiftys.org.uk/swifty.html
http://www.ringers.org.uk