CD Treatment

That’s not really very surprising. Reed Solomon error correction codes are very effective for predictable errors such as the ones the sliver of paper would produce. What Reed Solomon is not (rpt not) very effective at are random errors like external vibration, the fluttering of the disc and scattered background laser light. Reed Solomon will shut down the system when it encounters scratches that are circular. But it does very well for scratches that are radial. 

Begone, troll!

Ack chew ally, black around the edge hurts the sound. Sorry to burst your bubble. Pop! Musta been placebo effect. No offense.

You know you went too far down the rabbit hole when you start writing ‘x = PRESENT TIME and ‘x 26 ‘x in red pen on all your CDs. Coloring cassettes also.

I was under the impression scratches were not good on CDs. 

roberjerman
Another tweak was to load a second CD on top of the first one. More mass - claimed to improve stability of the spinning disc. I never tried this, fearing getting both CDs stuck!

>>>>Brilliant.

Clark Johnsen, audio provocateur extraordinaire, published Lotions Eleven, Fluid Dynamics of the CD - a review of eleven CD treatments of the time - in Positive Feedback. Among the sonically intrepid other methods of CD treatment include demagnetizing the CD, freezing the CD in the home freezer 🥶, de-ionizing the CD, stiffening the CD, beveling the outer edge of the CD, sanding the outer and inner edges of the CD, leveling the CD tray, using Silver Rainbow 🌈 Foil on the CD, Cream Electret, painting the outer edge purple, painting the inner edge black.

https://positive-feedback.com/Issue26/cjdiaries.htm

Of course, the green pen can provide modest improvements. But improvements nevertheless. However, the problem is too great for only a green pen, gentle readers. Green absorbs the visible color red, it’s red’s complement. And red appears in the scattered CD laser light, so some of the scattered light is absorbed. Thus, the amount of scattered light getting into the photodetector is reduced. That’s the reason the green pen is audible. But, wait, there’s more. The red portion of the CD laser is only the lower 1/4 of the bandwidth. Since the CD laser has a wavelength of 780 NM that means most of the scattered light the other 75% is not visible red but near infrared light which is invisible. Infrared light is immune to absorption by green or any other color. That’s where New Dark Matter comes in, it absorbs all light, visible and invisible. Thr