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BS: Whats the Holes in CD's for then?

Rt Revd Sir jOhn from Hull 02 Dec 04 - 08:09 PM
PoppaGator 02 Dec 04 - 08:14 PM
Clinton Hammond 02 Dec 04 - 08:23 PM
Amos 02 Dec 04 - 08:27 PM
Amos 02 Dec 04 - 08:31 PM
Dead Horse 02 Dec 04 - 08:38 PM
Bill D 02 Dec 04 - 09:08 PM
open mike 02 Dec 04 - 09:49 PM
Rabbi-Sol 02 Dec 04 - 10:25 PM
GUEST 02 Dec 04 - 10:31 PM
Dani 02 Dec 04 - 11:03 PM
Joe Offer 02 Dec 04 - 11:05 PM
Peace 03 Dec 04 - 12:50 AM
Splott Man 03 Dec 04 - 05:29 AM
Skipper Jack 03 Dec 04 - 05:36 AM
Paco Rabanne 03 Dec 04 - 05:46 AM
Grab 03 Dec 04 - 06:49 AM
matai 03 Dec 04 - 07:05 AM
Dave Hanson 03 Dec 04 - 07:10 AM
Sttaw Legend 03 Dec 04 - 07:11 AM
Pied Piper 03 Dec 04 - 07:45 AM
GUEST,Art Thieme 03 Dec 04 - 10:32 AM
GUEST,Art Thieme 03 Dec 04 - 10:35 AM
GUEST,leeneia 03 Dec 04 - 10:38 AM
GUEST,Blowz at work 03 Dec 04 - 10:46 AM
McGrath of Harlow 03 Dec 04 - 10:59 AM
Cluin 03 Dec 04 - 11:11 AM
Peace 03 Dec 04 - 11:18 AM
Bill D 03 Dec 04 - 11:38 AM
Peace 03 Dec 04 - 11:40 AM
Pauline L 03 Dec 04 - 11:56 AM
darkriver 03 Dec 04 - 12:31 PM
MudGuard 03 Dec 04 - 12:44 PM
MMario 03 Dec 04 - 01:06 PM
Carly 03 Dec 04 - 01:28 PM
Amos 03 Dec 04 - 04:43 PM
Joybell 03 Dec 04 - 05:12 PM
GUEST,Blind DRunk in Blind River 03 Dec 04 - 05:48 PM
The Fooles Troupe 03 Dec 04 - 07:29 PM
GUEST,Blind DRunk in Blind River 03 Dec 04 - 07:32 PM
GUEST,the old pooperoo 03 Dec 04 - 08:01 PM
Joybell 03 Dec 04 - 08:21 PM
Peace 03 Dec 04 - 09:24 PM
Peace 03 Dec 04 - 09:28 PM
Pauline L 04 Dec 04 - 12:40 AM
Dave Hanson 04 Dec 04 - 03:50 AM
Mrs.Duck 04 Dec 04 - 11:21 AM
Fergie 04 Dec 04 - 12:03 PM
el_punkoid_nouveau 04 Dec 04 - 02:00 PM
Peace 04 Dec 04 - 02:50 PM
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Subject: BS: Whats the Holes in CD's for then?
From: Rt Revd Sir jOhn from Hull
Date: 02 Dec 04 - 08:09 PM

Plastic records needed a hole in the middle, to fit on the spindle of the record player, but cd players have a slot that they fit in, so waht are the holes in the middle of cd's for then?


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Subject: RE: BS: Whats the Holes in CD's for then?
From: PoppaGator
Date: 02 Dec 04 - 08:14 PM

nostalgia

or, maybe, neuralgia.


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Subject: RE: BS: Whats the Holes in CD's for then?
From: Clinton Hammond
Date: 02 Dec 04 - 08:23 PM

"cd players have a slot that they fit in"

Ummm... no they don't... a CD is spun by fitting a 'spinner' into the centre hole... (gross! LOL)


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Subject: RE: BS: Whats the Holes in CD's for then?
From: Amos
Date: 02 Dec 04 - 08:27 PM

I believe it is for driving them round and round at a controlled rate of speed, without which they could not be read. The centering and driving device on some CD players is a cone-and-cup combination that sandwiches the CD through the hole.

See also How do CD Players Work


A


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Subject: RE: BS: Whats the Holes in CD's for then?
From: Amos
Date: 02 Dec 04 - 08:31 PM

And also the picture on http://stuffo.howstuffworks.com/cd4.htm which shows the cup deal for the center hole. The CD has a variable rate of speed depedning where the reader is on the long spiral groove or series of bumps that makes up the data.

A


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Subject: RE: BS: Whats the Holes in CD's for then?
From: Dead Horse
Date: 02 Dec 04 - 08:38 PM

So you can see through to the other side, stoopid!


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Subject: RE: BS: Whats the Holes in CD's for then?
From: Bill D
Date: 02 Dec 04 - 09:08 PM

and....it saves on plastic


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Subject: RE: BS: Whats the Holes in CD's for then?
From: open mike
Date: 02 Dec 04 - 09:49 PM

for target practice...
and to hang them in the cherry tree to keep birds away from the fruit


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Subject: RE: BS: Whats the Holes in CD's for then?
From: Rabbi-Sol
Date: 02 Dec 04 - 10:25 PM

So it can be snapped into the jewel case.

                                          SOL ZELLER


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Subject: RE: BS: Whats the Holes in CD's for then?
From: GUEST
Date: 02 Dec 04 - 10:31 PM

One should always know the answer to these questions before you ask them, noHj!
It makes you look less of an idiot.

ROTFLMAO


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Subject: RE: BS: Whats the Holes in CD's for then?
From: Dani
Date: 02 Dec 04 - 11:03 PM

So you can put them on your bulletin boards with push=pins. Very considerate design.

Dani


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Subject: RE: BS: Whats the Holes in CD's for then?
From: Joe Offer
Date: 02 Dec 04 - 11:05 PM

Hey, I didn't know the answer, either. I know that some CD players have spindles, but I didn't know the ones with drawers had 'em.
-Joe Offer-


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Subject: RE: BS: Whats the Holes in CD's for then?
From: Peace
Date: 03 Dec 04 - 12:50 AM

CDs don't wear drawers. The go around neked.


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Subject: RE: BS: Whats the Holes in CD's for then?
From: Splott Man
Date: 03 Dec 04 - 05:29 AM

It's for your finger


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Subject: RE: BS: Whats the Holes in CD's for then?
From: Skipper Jack
Date: 03 Dec 04 - 05:36 AM

Presuming that the grooves on a CD (if indeed there are grooves?) and the laser?? works on the same principle as the old needle for LP's. Then, it is to be supposed that when it arrives at the hole in the middle, it stops!!


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Subject: RE: BS: Whats the Holes in CD's for then?
From: Paco Rabanne
Date: 03 Dec 04 - 05:46 AM

Why are CD covers called 'jewel cases?'


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Subject: RE: BS: Whats the Holes in CD's for then?
From: Grab
Date: 03 Dec 04 - 06:49 AM

"My cassettes just fit in a slot and play. Why do they need this tape stuff inside them - after all, they play without me needing to touch the tape?"


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Subject: RE: BS: Whats the Holes in CD's for then?
From: matai
Date: 03 Dec 04 - 07:05 AM

So you can see through them.


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Subject: RE: BS: Whats the Holes in CD's for then?
From: Dave Hanson
Date: 03 Dec 04 - 07:10 AM

To let the air out.

eric


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Subject: RE: BS: Whats the Holes in CD's for then?
From: Sttaw Legend
Date: 03 Dec 04 - 07:11 AM

It was modelled on the elephant hole


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Subject: RE: BS: Whats the Holes in CD's for then?
From: Pied Piper
Date: 03 Dec 04 - 07:45 AM

As pointed out above CD's work in essentially the same way that Records do in that the information is recorded sequentially as the disc revolves and read off in the same manner.

I recently acquired some dead CD ROM drives to obtain motors for making BEAM robots.
There are 3 Motors, one to rotate the disc, one to move the heads, and one to eject the CD.

PP


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Subject: RE: BS: Whats the Holes in CD's for then?
From: GUEST,Art Thieme
Date: 03 Dec 04 - 10:32 AM

...so they might be used as a male contraceptive diaphragm.

Art Thieme


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Subject: RE: BS: Whats the Holes in CD's for then?
From: GUEST,Art Thieme
Date: 03 Dec 04 - 10:35 AM

...or as a not very effective contraceptive for Catherine the great !!

Art (yet again)


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Subject: RE: BS: Whats the Holes in CD's for then?
From: GUEST,leeneia
Date: 03 Dec 04 - 10:38 AM

The hole allows scratchy sounds and thk sounds to escape out the back of the player. That is why CD's are superior in purity of sound to LP's.


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Subject: RE: BS: Whats the Holes in CD's for then?
From: GUEST,Blowz at work
Date: 03 Dec 04 - 10:46 AM

Is it so you can put string through them and hang them on your Christmas tree?


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Subject: RE: BS: Whats the Holes in CD's for then?
From: McGrath of Harlow
Date: 03 Dec 04 - 10:59 AM

the long spiral groove

As I understand it, unlike with real records, the grooves in CDs aren't a spiral, they are concentric circles.


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Subject: RE: BS: Whats the Holes in CD's for then?
From: Cluin
Date: 03 Dec 04 - 11:11 AM

Holes are in the centre of our CDs so that extra laser light can be bled off the CD before it harms the information on it. The spinning of the disc pools the excess photons from the laser in the centre, where they are easily collected by the Tachyon Gremlins which reside in our CD players. They bale up the excess light bits and trade them to the Tachyon Sprites who live in our camera flash units in exchange for fingerprints collected off the bezels of the flash. It's a mutually satisfying trade arrangement, though it results in strangely appearing fingerprints on our CDs and red-eye effects on our photos, but that's just a couple of things we have to put up with in our technologically advanced world today.

Next question?


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Subject: RE: BS: Whats the Holes in CD's for then?
From: Peace
Date: 03 Dec 04 - 11:18 AM

Huh? Like, whaaaaaaaaaaaaaaaaaaaaaaaaat?


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Subject: RE: BS: Whats the Holes in CD's for then?
From: Bill D
Date: 03 Dec 04 - 11:38 AM

Cluin...you can't fool me, Little Hawk wrote that explanation for you!


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Subject: RE: BS: Whats the Holes in CD's for then?
From: Peace
Date: 03 Dec 04 - 11:40 AM

OK. I went, had a quick toke: Cluin, RUNNNNNNNNNNNNNNNN.


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Subject: RE: BS: Whats the Holes in CD's for then?
From: Pauline L
Date: 03 Dec 04 - 11:56 AM

That's where all your money goes.


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Subject: RE: BS: Whats the Holes in CD's for then?
From: darkriver
Date: 03 Dec 04 - 12:31 PM

GUEST of 10:31 PM:

jOhn never looks like an idiot.

His job is to provide provocative questions and play the fool, and he does it very well. Remember the phrase A fool is wise in his folly.

doug


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Subject: RE: BS: Whats the Holes in CD's for then?
From: MudGuard
Date: 03 Dec 04 - 12:44 PM

Skipper, unlike old time records, data recorded on a CD starts at the center and end at the outer edge.

McGrath, it is one spiral.

And the main purpose of the hole is for the spinning motor - it is also used for centering the CD in the drive mechanism.


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Subject: RE: BS: Whats the Holes in CD's for then?
From: MMario
Date: 03 Dec 04 - 01:06 PM

I think I like leenia's and cluin's answers...

minidisks of course have great sound because there isn't ROOM on them for the hisses and scratches and pops...


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Subject: RE: BS: Whats the Holes in CD's for then?
From: Carly
Date: 03 Dec 04 - 01:28 PM

If you stick a dowel through that hole you get a nicely-balanced drop spindle, an update of one of the earliest tools known.


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Subject: RE: BS: Whats the Holes in CD's for then?
From: Amos
Date: 03 Dec 04 - 04:43 PM

Kevin:

From one of the How Do They Work links up above:

"A CD has a single spiral track of data, circling from the inside of the disc to the outside. The fact that the spiral track starts at the center means that the CD can be smaller than 4.8 inches (12 cm) if desired, and in fact there are now plastic baseball cards and business cards that you can put in a CD player. CD business cards hold about 2 MB of data before the size and shape of the card cuts off the spiral.

What the picture on the right does not even begin to impress upon you is how incredibly small the data track is -- it is approximately 0.5 microns wide, with 1.6 microns separating one track from the next. (A micron is a millionth of a meter.) And the bumps are even more miniscule..."


A


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Subject: RE: BS: Whats the Holes in CD's for then?
From: Joybell
Date: 03 Dec 04 - 05:12 PM

I'm glad you asked Sir jOhn. It's a question many did not dare to ask. We need you for the really tricky problems.

NOW!
What do they do with the holes when they remove them?
Can I buy some?
If I could, how would I know that I didn't just have a big bag of nothing?
Joy


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Subject: RE: BS: Whats the Holes in CD's for then?
From: GUEST,Blind DRunk in Blind River
Date: 03 Dec 04 - 05:48 PM

The guy that started this flippin' thread has goota be the stupidest person in the whole FLIPPIN' WORLD! What an idiott.


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Subject: RE: BS: Whats the Holes in CD's for then?
From: The Fooles Troupe
Date: 03 Dec 04 - 07:29 PM

But just think how many utterly clueless fools he has got to join in over time!

And you think HE's a fool?

I'm probably going to have to leave Mudcat eventually - just too much competition...

Fooles Troupe


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Subject: RE: BS: Whats the Holes in CD's for then?
From: GUEST,Blind DRunk in Blind River
Date: 03 Dec 04 - 07:32 PM

Yeh? Don't try and outsmart me, Fool's troop. I know others that tried, eh?


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Subject: RE: BS: Whats the Holes in CD's for then?
From: GUEST,the old pooperoo
Date: 03 Dec 04 - 08:01 PM

"what do they do with the holes when they remove them?"
really, joybell! why don't you THINK? look at any CD. it has a hole in it. the holes have not been removed: they have been INSTALLED. if you want to get a bag of holes, you have to find a hole retailer, or go straight to the hole manufacturer. and i think you'll find that they are not just useful in CDs. i've found hundreds of uses for them around the house. you may have to do a bit of shopping around, tho, to make sure you get good-quality holes. the shoddy ones wear out after a while, especially if they get a lot of wear.
o.p.


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Subject: RE: BS: Whats the Holes in CD's for then?
From: Joybell
Date: 03 Dec 04 - 08:21 PM

Hmmm Off to find a HOLE EARTH catalogue.
How do they install them in smoke then, Smarty-Pants? Where do they make holey smoke anyway. Holey ground - now I've seen that. You can install holes in the ground your ownself. I like to do that. Don't remember where I got the holes from beforehand though.
Then there's the mystery of "the hole in one". One what? What do they wrap holes in when you buy them?
                                        Still puzzled.


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Subject: RE: BS: Whats the Holes in CD's for then?
From: Peace
Date: 03 Dec 04 - 09:24 PM

They wrap holes in the same material they use to contain the universal solvent.

The holes are there because without them it would make CDs look like donuts that have no holes: ridiculous. What's a donut with no hole for the love of Pete? It's just a stuffed pastry; a bun filled with jam or pudding, and IMO, that ain't a donut. Besides, when's the last time you even SAW a CD filled with jam? Oh, yeah, Pearl Jam, but like--anyway, I have lost my train.


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Subject: RE: BS: Whats the Holes in CD's for then?
From: Peace
Date: 03 Dec 04 - 09:28 PM

Of thought. So, when the holes get centered, what stops the hole manufacturererers from making the holes square or triangular or dodecahedrononon shaped? Nothing! That's right, NOTHING. Same for Tim Horton. That's all I have to say about the Golden Age of Steam. Glad I got the train back on the road.


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Subject: RE: BS: Whats the Holes in CD's for then?
From: Pauline L
Date: 04 Dec 04 - 12:40 AM

Someone recommended finding a good retailer to buy holes from, but you can get them much cheaper if you buy them holesale.


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Subject: RE: BS: Whats the Holes in CD's for then?
From: Dave Hanson
Date: 04 Dec 04 - 03:50 AM

Ther are four thousand of them in Blackburn [ Lancashire ] very small
but they had to count them all.

eric


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Subject: RE: BS: Whats the Holes in CD's for then?
From: Mrs.Duck
Date: 04 Dec 04 - 11:21 AM

We have a number of CDs that over the years have had jam in their holes. If you are very careful it can be cleaned off without detriment to the contents so long as they don't insert it into the player. Insertion of jam covered toast is what caused the demise of the VCR so they invented DVDs which of course won't allow even a thin slice in. You will note that since Tescos started baking on the premises Dixons have had to withdraw all VCRs from the shelves!


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Subject: RE: BS: Whats the Holes in CD's for then?
From: Fergie
Date: 04 Dec 04 - 12:03 PM

The hole is there so that you can convert them into clocks
Fergus


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Subject: RE: BS: Whats the Holes in CD's for then?
From: el_punkoid_nouveau
Date: 04 Dec 04 - 02:00 PM

The truth lies in the fact that the CD was invented by Phillips, a Dutch company. At that time, the Dutch used the Gilder as their currency, and was subdivided into Cents (or something similar). And a ten (or was it twenty, or even twenty five) cent coin fits perfectly into the hole - well, actually, the hole fits perfectly round the coin.

So the hole is for all these wealthy Phillips executives to carry their money in!

epn


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Subject: RE: BS: Whats the Holes in CD's for then?
From: Peace
Date: 04 Dec 04 - 02:50 PM

And what about the hole on the outside, huh?


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