demagnitizing CD s?

Albert I think there are two types of Mag Lev trains in existence today (as far as I know) – one uses attractive magnetic forces and the other uses repulsive magnetic forces. Keep in mind that electricity and magnetism are forever linked together through Ampere's Law and Maxwell’s equations. Where there is current there is a magnetic field. Trains that use opposite magnetic fields are called electrodynamic trains. Trains that use attractive magnetic fields are called electromagnetic trains. So in the case of aluminum a current is passed through the aluminum and creates a magnetic field. A similar opposite current is passed through the rail and an opposing magnetic field is created. The two fields repel one another and the train is lifted. No back to the topic… If there is any charge on the CD (say like static) and you rotate that through a magnetic (say from internal power supply) field you have created current and a weak (I think opposing – not sure) magnetic field. If the laser pickup (wiring) is at all susceptible to induced EMI then I could see more "hash" in the system. Remember just rotating some wire through a strong magnetic field creates a generator I wonder if a CD behaves as a capacitor seeing how it is a conductor wrapped by a dielectric. It would be nice if the plastic were conductive so the platter could ground the CD as is plays - no charge - no voltage - no voltage no current – no current no magnetic field. Sorry for my EE rambling …. Cheers, Dan

Hey Guys, are we dealing with system deficiencies or hearing
deficiencies??? The difference in using the dual-beam Bedini
vs. no treatment is a no-brainer. The difference is not a
subtle thing at all. It doesn't have to be any particular
unit, but effectively getting the flux field off the CD has
got to be a priority for and type of serious listening.

brauser, what are the improvements you are hearing, which as you say makes Bedini II a "no brainer" tweak? Are you using duplicate CDs to carefully compare treated vs untreated CDs? And if you aren't what do you base your observations on?

Not to derail the magnetic train thread, but what about destaticizing CDs? I've never done it (nor ANY CD tweak for that matter), but I was told that that MAY make a difference with CDs (something about static charge causing "scattering" of the laser or some such explanation). I'm getting ready to purchase a Zerostat for my LPs, and may just squirt some ions onto my few CDs to see, er, hear if there's a difference. Anyone?

Musikdok, I have not tried the Zerostat on CD's, but I am certain that it would not hurt anything. At the very least, the CD should become less likely to collect dust particles that can interfere with the laser pickup. Regarding other tweaks, there are countless cleaners and treatments for CD. I saw Audio Research using a CD spray treatment, and upon discussing it with them, they are convinced it is worthwhile. ARC is a pretty conservative company, I doubt that they would say that unless they heard a significant improvement. I used to use the CD stoplight, sold by Audioprism, this green fluid could be applied to the edge (both center and outer) and supposedly stopped laser scatter from introducing errors in the circuit. I do know that it was easily audible after applying, but each of you must decide how much of this is for you. As far as the other comments posted here, concerning static, magnetics, etc. I would not be surprised if any and all of these played some role in reproduction. The CD format is totally electrical in its retrieval, but at the same time, powered by a mechanism (motor) not far removed from a LP turntable. I believe that all the things that are done to isolate, insure speed accuracy, and prevent excessive vibration in a LP turntable, probably would apply to CD. I also suspect that there are many electrical things happening inside a CD player, that we do not fully understand. Certainly there is no harm in experimenting with some of these tweaks, the costs involved are ridiculously low. As in all things in life, garbage in and garbage out. Even a small change at the front end of a system can result in a really nice improvement in the music.