In Defense of the Compact Disc - AVS Forum
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post #1 of 15 Old 03-16-2013, 10:38 AM - Thread Starter
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Just wrote a blog entry about my love for the compact disc. Mostly for my own amusement, but I appreciate any feedback. Cheers!

http://numeralnine.wordpress.com/2013/03/14/in-defense-of-the-compact-disc/
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post #2 of 15 Old 03-16-2013, 12:04 PM
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Excellent article. I'm with you 100 percent.

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post #3 of 15 Old 03-16-2013, 02:59 PM
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CDs produce 65,536 different frequency levels

Amplitude, not frequency.
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post #4 of 15 Old 03-16-2013, 03:21 PM - Thread Starter
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Thank you, A9X-308. Fixing that.
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post #5 of 15 Old 03-16-2013, 03:41 PM
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I don't think you want to be comparing CDs and computer files, since many sound formats can be stored as computer files, including that of Redbook format CDs. It seems you really have MP3s in mind, but there are lots of other sorts of computer files, including those with more than two channels, e.g. DD5.1.

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post #6 of 15 Old 03-17-2013, 03:04 PM
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Excellent article, Greenwood!


Regards,
Wayne A. Pflughaupt



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post #7 of 15 Old 03-17-2013, 04:08 PM
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Nice article but I still like all the rt vinyl had like the album cover of the Stone's Satanic Majesty's Request.

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post #8 of 15 Old 03-17-2013, 06:26 PM
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Nice read.

The best audio advice I’ve heard is that what makes a difference first and foremost is recording quality. (Second is loudspeaker quality, and third is room acoustics. Absolutely everything else is comparatively unimportant)

I wouldn't go so far as to say everything else is comparatively unimportant. Less important perhaps.

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post #9 of 15 Old 03-19-2013, 12:40 PM
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Agreed.

The only gripe I have about CDs is how easily they can be scratched (and the early learning in the late 80s that the back of the CD is usually more susceptible as the metal layer and encoded surface of the back of the front layer are closer)
I wish there was a way to get at cost replacement discs.
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post #10 of 15 Old 03-19-2013, 03:13 PM
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Quote:
Originally Posted by noisebeam View Post

The only gripe I have about CDs is how easily they can be scratched (and the early learning in the late 80s that the back of the CD is usually more susceptible as the metal layer and encoded surface of the back of the front layer are closer)
You're worried about the back of the disc being damaged so it can't be played? Good grief.
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I wish there was a way to get at cost replacement discs.
Even cheaper is EAC and burn a new disc. About 20c total cost.
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post #11 of 15 Old 03-19-2013, 04:21 PM
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You're worried about the back of the disc being damaged so it can't be played? Good grief.
Even cheaper is EAC and burn a new disc. About 20c total cost.

Yes, the back of the disc. Even if a bad practice people lay CDs down out of the case. Since scratches can be more damaging on the backside, it is better to put it face down instead of back down. You can polish the front.
EAC only works for minor damage.
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post #12 of 15 Old 03-19-2013, 04:30 PM
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Quote:
Originally Posted by noisebeam View Post

Yes, the back of the disc. Even if a bad practice people lay CDs down out of the case. Since scratches can be more damaging on the backside, it is better to put it face down instead of back down. You can polish the front.
Of course you can polish the front, but you can also prevent it being an issue by taking care of what you own.
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EAC only works for minor damage.
Rubbish. I've been able to repair massively damaged discs with EAC and gotten correct Accuraterip results. Sometimes it just takes a long time.
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post #13 of 15 Old 03-19-2013, 05:49 PM
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Of course you can polish the front, but you can also prevent it being an issue by taking care of what you own.
.
As I noted that was a learning in the late 80s. When CD first came out they were marketed as being quite robust.
Shallow and moderate scratches can be polished out from the front, but only shallow scratches on the back are harmless, a moderate one will cut into the metal layer

In this profile of a CD on the left a scratch 0.1mm or deeper will cut into the metal layer and the pits that are up against it. A scratch from the front can be 11 times deeper before it gets to those pits or metal layer.

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post #14 of 15 Old 03-19-2013, 06:55 PM
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Quote:
Originally Posted by A9X-308 View Post

Rubbish. I've been able to repair massively damaged discs with EAC and gotten correct Accuraterip results. Sometimes it just takes a long time.

+1

I recently went through several hundred disks and archived them to FLAC, some of them many years old and severely abused. dbpoweramp had no problem restoring them to perfection. As I recall, only 2 disks had to be thrown out.

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post #15 of 15 Old 03-19-2013, 07:35 PM
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Quote:
Originally Posted by noisebeam View Post

As I noted that was a learning in the late 80s. When CD first came out they were marketed as being quite robust.
Shallow and moderate scratches can be polished out from the front, but only shallow scratches on the back are harmless, a moderate one will cut into the metal layer

In this profile of a CD on the left a scratch 0.1mm or deeper will cut into the metal layer and the pits that are up against it. A scratch from the front can be 11 times deeper before it gets to those pits or metal layer.

I'm long aware of the construction of a CD. However, to get a scratch in the back of the disc like that requires carelessness or complacency of a high order. I'm not at all careful with mine and have never had one damaged beyond repair by a mark to the back.
It seems to more of a confected issue than a real one.

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I recently went through several hundred disks and archived them to FLAC, some of them many years old and severely abused[\quote]Mid 2000's a young woman I worked with came in crying because some bastard had taken one of her CDs and deliberately damaged it. The disc was of her late Uncle and was a home made recording and completely irreplaceable. It took 12 hours to read the entire disc and although not perfect, containing a rare click it was a massive improvement. I made her a heap of copies and the response I got well worth the reduced life of my drive.

This was the first time I'd used EAC on a disc this badly damaged and was stunned at the result.
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