[cctalk] FWIW CD & DVD demagnitizitation [was: Double Density 3.5" Floppy Disks]

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-… 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… 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>