Extreme A/V Liquid Resolution and Jena Labs 3D-X are among the very best of today's CD treatments.
Anyone try purple pen on the CD edge?
Anyone try purple pen on the CD edge?
TAS Recommended CD Tweak….
In The August issue of The Absolute Sound, RH gives a glowing review of a product from Digital Systems & Solutions – “UltraBit Platinum Optical Impedance Matching Disc Treatment System.” According to RH, he was floored and, “….This wasn’t a subtle difference; there was a wholesale increase in apparent resolution, space, clarity, soundstage dimensions, and vividness.”
Apparently, this is a liquid solution that is applied to CDs and DVDs ($65/bottle).
Regardless of the whole “advertising thing,” I don’t believe someone like RH would put his reputation on the line by giving a bogus review. I wonder what, “This wasn’t a subtle difference…” means to the average person’s ears?
Also, in the same article, RH makes the statement, “…Similarly, it’s incontrovertible that a CD-R burned from a CD sounds better than the original CD.” I did not know this. Have any of you come to the same conclusion?
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Racamuti...Error correcting codes are really interesting, and much more widespread than you might think. IMHO the most dramatic example is in the transmission of data from distant space probes using tiny transmitter power. For example, transmissions from a probe in orbit around Saturn can "drop out" for about a minute, and still all the data can be recovered intact. Of course, to do this a great deal of bandwidth is devoted to the redundancy needed for error recovery. As I have said before, error correction is not a band aid for transmission errors. It is an integral part of the Hardware/Software data transmission system. Error correction makes it possible to operate the hardware much faster than if it had to be error free, and even though some bandwidth is used up for the error correction capability, the overall result is higher bandwidth. |
I suggest you read up on error correcting encoding. Yes it is based on Reed-Solomon Interleave. However, contrary to what Eldartford mentions, if the error correction fails (a really badly damaged CD) then most players will "interpolate" between data points. On a bad CD with "CD Rot" it can actually sound exactly like Vinyl surface noise (pops and clicks). If error correction did not work to way more than 99.9999% accuracy then your PC that you are using to view this thread would crash constantly (perhaps it does and you need a new hard drive...). Despite the fears propagated by analog users about CD accuracy, all the science suggests that CD discs and readers are generally orders of magnitude (10's and 100's of times) more accurate than any analog reproduction. Digital is the only way to preserve data such that it can be copied thousands and thousands of times without error - this is because errors do not accumulate as they do in any analog chain. All this makes computing, satellites and other amazing things possible, stuff that purely Analog systems are incapable of. Of course A to D and D to A conversion is a crucial step and it is fair for analog users to criticise the quality of this process, however, this step occurs after the data has been read, decoded and error corrected from the disc. |
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Shadorne...Yes. If the error correction can't hack it data is interpolated. Not the greatest, but preferable to aborting the disc if it happens once or twice. I didn't mention that because it clouds the issue, and it ain't supposed to happen unless the CD disc is badly damaged. The RS code is configured to reliably correct errors to the extent they are expected from the hardware, and to handle most kinds of disc damage. |
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