does anyone sharpie thier CD's???

Science smyence, I think it needs to be required to have a masters degree in science before one is allowed to listen to one's system. We actually need to fully understand every component of the system audio signal as it travels through the system and eventually to the speakers and then our ears.

I think this is mans worshiping at the alter of science as their god. everything has to be explained by science and it sadly trickles down into audio!!!!!. Even a fun hobby of just listening to audio. This is listening to music.

It's time to go back to college!

Freeman: "I think this is mans worshiping at the alter of science as their god. everything has to be explained by science and it sadly trickles down into audio!!!!!. Even a fun hobby of just listening to audio. This is listening to music."

"Trickles down into audio!!!!!"? WHAT?!
Don't know where you've been hiding, but it took "science" to design the first amplifier ever made. Audio equipment, as you know it, is merely an advancing bi-product - cultivated into marketable electronics. Just about every audio manufacturer touts improved scientific attributes over previous models, or the competition's, and is what mainly perpetuates sales.

Are you honestly telling us that you've never read/compared a manufacture's claimed specifications, or read technical explanations for why their product design is superior to another? Every aspect of this evolving hobby encompasses science, whether you realize it or not. To so many audio hobbyists, HiFi may appear to be the electronics frontier, with but a tiny fraction actually understanding HOW electronics work, thus susceptible to influence by the marketing "machine", or documented psychological reasons.

"...back to college!" is right!

Shadorne, you said, "The green marker on the edge of the disc....This is the kind of stuff science is able to deal with." I agree with you; but how does science deal with it when the best color is purple? :-)

Red: 780 nm, Orange: 620 nm, Yellow: 585 nm, Green: 570 nm,
Blue: 490 nm, Indigo: 440 nm, Violet: 420 nm

Purple is shorter wavelength than Green. Since the light from a CD laser is Red (780 nm) then purple, being further from red than green, will filter out more red light. Therefore purple will be more effective than green, as a filter.

Another factor is that purple has six letters and green has only five but nobody will buy that argument...