How difficult is it to measure and compare "With/Without" signals?
Even if the signals are not identical when "grabbed twice", it should be
possible to statistically evaluate and compare how clean the signals are.
. . . and therefore, to what extent the "improvement" is a placebo effect.
And/or, select a large sample of listeners, and have them rate the signals
multiple times, without knowing which signal they are listening to. That
would call for having many multiple players, since the device purports to
"repair" the player.
--
Grumpy Ol' Fred ci...@xenosoft.com
On Tue, 7 May 2024, CAREY SCHUG via cctalk wrote:
my ears would never be good enough to notice any difference....
For what it's worth:
First, in general, there are so many apparent reviews of so many products, it
is hard to believe they are all scams. How can there be enough fools to buy
enough of those products to have that many different ones? I mean, it takes a
lot of work to develop a product, if you only sell 5, it is not worth it. if
you take money and don't send anything,t hat would show up in a google search.
also, what some hinted at is the issue is even a very slight amount of
magnitsm, spinning very fast, could affect the signal in the playback head....
Do CDs and DVDs have parity and or checksums? If you grab a CD twice, will
both results be identical bit for bit?
https://www.gcaudio.com/tips-tricks/cd-dvd-demagnetization/
https://forum.audiogon.com/discussions/if-you-have-a-cd-player-you-need-to-do-this-periodically
At first, this SEEMS even more ludicrous, demagnetizing vinyl LPs, but the
pickup heads are analogue magnetic, so maybe more reasonable
.
https://www.canadianhifi.com/shop/analog/accessories/furutech-demag-a-lp-cd-cable-demagnetizer/
If my email for him still works, I have asked a relative that use to make a
then over $1000 (1970s?) crossover for subwoofers (50hz?) for the audiophile
market. Just the crossover (signal separator), not the amp needed after that.
<pre>--Carey</pre>
On Monday (05/06/2024 at 06:58PM -0700), Fred Cisin via cctalk wrote:
Ignorant question:
Q: When looking for current availability of bulk tape/disk demagnetizers, on
eBay, I ran into a lot of CD/DVD demagnetizers
What kind of a problem do they have with magnetism?
