I’m not a big fan of the magnetic ink theory for the simple reason the ink on the CD label could only contain trace ferrous material, at best. I.e., not enough ferrous material to produce a magnetic field of sufficient strength to affect either the CD laser or any electronic elements in proximity to the CD. And certainly nowhere near the magnetic field strength of big honking transformers such as found in a modded Oppo CD player, for example. And perhaps not even near the strength of induced magnetic fields in wire. For the same sort of reason I’m not a fan of the magnetizable metal layer theory, either, as the CD metal layers are quite pure aluminum, gold or alloys. So, there must be a different theory.
Why demagnitize an optical reader?
I've read numerous times now that folks state to demagnetize a CD or optical disc before playing it for best fidelity and accuracy. I don't see how an optical device, which is non magnetic and made from non magnetic materials benefits from a demag process. Does anyone have any information to support this? Other than hype, of course.
Robert
Robert