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Marigo Audio Labs 3-D Signature Stabilizer Mat Accessory

I have always wondered how these CD tweeks work. Some time ago, Robert Harley tested a bunch of them and came to these conclusions:

“First, none of the CD tweaks reduced data errors. Neither the Block Error Rate, nor the ability to correct, rather than conceal, errors was affected by any of the devices or treatments. In fact, BLER slightly increased after application of liquids to the disc, probably the result of tiny surface scratches introduced when buffing dry.”

“As with error rates, none of the devices or treatments reduced jitter in the HF signal.”

He never admitted that they didn’t work, he just couldn’t document a connection between perceived improvement and his objective measures.

Hey, I know the audiophile mantras: “measurements aren’t everything” “I trust my ears”

But aren’t you just a little bit curious as to why we can’t document the effectiveness of these digital tweeks?

CD: Jitter, Errors & Magic by Robert Harley, Stereophile, May, 1990


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