Near Perfect CD Sound?

serengetiplains · 22nd November 2004, 08:36 PM

I just finished reading Clark Johnsen's Positive Feedback article titled "The Biggest News You May Ever Read (About Audio)." In it, Johnsen discusses a method of re-recording CDs developed or discovered by a fellow, George Louis, operating under the guise of a company called Digital Systems & Solutions. The re-recording, using Louis' "alogorithm codes," evidently improves the sound of an original cd, and as Johnsen would have it by not a subtle degree. Johnsen calls the improvement "the most astonishing single improvement in sound I have ever experienced." He also suggests the process elicits "master tape-type quality from Redbook CDs."

Has anyone any experience with what Johnsen is talking about? Investigating his claims will be easy enough, which I plan myself to do. I'm wondering if anyone has a sense of what might be at play in Louis' re-recording process. Comments anyone?

zygibajt · 22nd November 2004, 11:21 PM

Very interesting , thanks for the links

I don't see much interest in this topic so far.

I remember reading some year ago about some guy who made the research on JITTER topic.
He realeted that under some circumstances the Jitter can be canceled from the original CD copying it a number of times.

He claimed that for every CD there is optimal number of copies (copy from the copy...etc) that has to be made to cancel the jitter totally and release the true sound of the original recording.

Bartek

David@NY · 23rd November 2004, 06:36 AM

zygibajt,
Do you still have the article around?

Elso Kwak · 23rd November 2004, 06:49 AM

I have one copied CD in my possession. It has a very noisy eye-pattern and sounds more "digital" than the original. (The eye-pattern is the signal coming from the laserhead before it is processed in the player making it "bits" again.)

serengetiplains · 23rd November 2004, 04:13 PM

Elso, on what machine was the disk copied?

Bill Fitzpatrick · 23rd November 2004, 04:31 PM

More snake oil?

serengetiplains · 23rd November 2004, 04:38 PM

Quote:

Originally posted by Bill Fitzpatrick
More snake oil?

Possibly. And possibly a real improvement. Darn, if only everything were knowable beforehand.

gmarsh · 23rd November 2004, 07:29 PM

I guess this machine applies a green pen in the digital domain.

Elso Kwak · 24th November 2004, 07:05 AM

Quote:

Originally posted by serengetiplains
Elso, on what machine was the disk copied?

Just a PC, Pentium I suppose.

OliverD · 29th November 2004, 02:28 PM

Someone still has to explain to me that "jitter on the CD" thing (as opposed to "jitter at the DAC in the CD player") and how it affects sound quality.

22nd November 2004, 08:36 PM	#1
serengetiplains diyAudio Member Join Date: Feb 2004 Location: Canada	Near Perfect CD Sound? I just finished reading Clark Johnsen's Positive Feedback article titled "The Biggest News You May Ever Read (About Audio)." In it, Johnsen discusses a method of re-recording CDs developed or discovered by a fellow, George Louis, operating under the guise of a company called Digital Systems & Solutions. The re-recording, using Louis' "alogorithm codes," evidently improves the sound of an original cd, and as Johnsen would have it by not a subtle degree. Johnsen calls the improvement "the most astonishing single improvement in sound I have ever experienced." He also suggests the process elicits "master tape-type quality from Redbook CDs." Has anyone any experience with what Johnsen is talking about? Investigating his claims will be easy enough, which I plan myself to do. I'm wondering if anyone has a sense of what might be at play in Louis' re-recording process. Comments anyone? __________________ Tom

23rd November 2004, 06:49 AM	#4
Elso Kwak Banned Join Date: Dec 2001 Location: Zamboanga, City of Flowers, Mindanao	Copied CD I have one copied CD in my possession. It has a very noisy eye-pattern and sounds more "digital" than the original. (The eye-pattern is the signal coming from the laserhead before it is processed in the player making it "bits" again.)

23rd November 2004, 04:13 PM	#5
serengetiplains diyAudio Member Join Date: Feb 2004 Location: Canada	Elso, on what machine was the disk copied? __________________ Tom

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22nd November 2004, 11:21 PM	#2
zygibajt diyAudio Member Join Date: Jun 2003 Location: Wroclaw	Very interesting , thanks for the links I don't see much interest in this topic so far. I remember reading some year ago about some guy who made the research on JITTER topic. He realeted that under some circumstances the Jitter can be canceled from the original CD copying it a number of times. He claimed that for every CD there is optimal number of copies (copy from the copy...etc) that has to be made to cancel the jitter totally and release the true sound of the original recording. Bartek

23rd November 2004, 06:36 AM	#3
David@NY diyAudio Member Join Date: Nov 2004 Location: New York	zygibajt, Do you still have the article around?

23rd November 2004, 04:31 PM	#6
Bill Fitzpatrick diyAudio Member Join Date: Jun 2001 Location: Eugene, OR	More snake oil?

23rd November 2004, 07:29 PM	#8
gmarsh diyAudio Member Join Date: Apr 2004 Location: Halifax, NS, Canada	I guess this machine applies a green pen in the digital domain.

29th November 2004, 02:28 PM	#10
OliverD diyAudio Member Join Date: Nov 2002 Location: Germany	Someone still has to explain to me that "jitter on the CD" thing (as opposed to "jitter at the DAC in the CD player") and how it affects sound quality.

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