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Posted

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The only reason I stumbled across this is because I was playing a CD I just got today (used) and it was fine until halfway through the last track, when it began skipping and then basically stopped playing. I checked the surface and noticed a rather long scratch near the outer edge of the disc.

Sure enough, that's where the last track resides.

Posted

If it starts on the inside, it gets in the groove, doesn't need a dime taped to the arm, and will track properly to the end.

I could never figure out why a CD plays from the inside out. I guess it's easier on the needle, right?
Posted (edited)

CompSci_img019.gif

The only reason I stumbled across this is because I was playing a CD I just got today (used) and it was fine until halfway through the last track, when it began skipping and then basically stopped playing. I checked the surface and noticed a rather long scratch near the outer edge of the disc.

Sure enough, that's where the last track resides.

Have you never noticed how the most common place to get those static skips is towards the end of a disc? Normally because you've plonked a sticky finger-print there!

Has anyone programmed their player to go the other way. Might reveal some astounding revelations on a few 60s/70s discs!

Edited by Bev Stapleton
Posted

I made that same discovery you made a while ago; I was looking at a cd and noticed that some the outside area were blank. An eureka moment! :) I think we assume that the cd will be like a lp: outside to in.

Posted

Well, that's another thing, why don't they save plastic by not making the CDs any bigger than the amount of groove? I mean, go green and all that, right?

That's been sorted. It's called downloads!

Has anyone programmed their player to go the other way. Might reveal some astounding revelations on a few 60s/70s discs!

"I buried Bev." :unsure::ph34r:

Or "Paul is going to make some really dire records after this one."

Posted

If you come across any pre-1920 discs on Pathe (pre 1932 in France), you'll find that:

you need a 0.05" stylus to play them with;

the groove goes up and down, not side to side;

the records had to be played at 90 rpm;

they came in 8.5 inch, 10 inch, 11.75 inch, 12 inch, 14 inch, and 20 inch sizes; and

THEY PLAYED FROM INSIDE TO OUTSIDE.

http://en.wikipedia.org/wiki/Path%C3%A9_Records

mg

Posted

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Actually, they don't play anti-clockwise, as shown in this illustration. The read head is below the CD, so what appears to be anti-clockwise from above is actually clockwise from the point of view of the read head.

MG

Inside out and upside down. ... This sounds like one of those engineering jobs where they said at the start, "What if we did everything exactly opposite to the way it works now?"

... If only the marketing guys had done the same thing and come up with the 'pay it forward' method for acquiring CDs. Then we'd really have had something!

Posted

CompSci_img019.gif

Actually, they don't play anti-clockwise, as shown in this illustration. The read head is below the CD, so what appears to be anti-clockwise from above is actually clockwise from the point of view of the read head.

MG

Inside out and upside down. ... This sounds like one of those engineering jobs where they said at the start, "What if we did everything exactly opposite to the way it works now?"

... If only the marketing guys had done the same thing and come up with the 'pay it forward' method for acquiring CDs. Then we'd really have had something!

Oh, and did you realise the CDs have to change speed as the music progresses?

MG

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