This just reeks of snake-oil salesman to me.
The idea that this shop sells a CD player (or has CD's) that require anti-static treatments and demagnetization in order for the equipment to sound decent is crazy. Is this your experience at home using CDs? Did he say how often his discs built up static? I have never noticed my discs pulling at the hairs on my arm, but I am sure it could happen with them being plastic.
My suspicion is that what you heard was real, but there was trickery involved!
I would guess the antistat spray should not break the bank, so why not try it and see if you detect a similar improvement at home to the experience you had in the shop? Your CD's have probably never been treated, so you would think it might make a huge difference!
Item 3 makes some sense, but the problem is cleaning the laser is on the digital side of things and it is not like analog where you get incremental improvements. Either the laser reads a "1" or a "0". If it reads the wrong thing (more often than the error correction algorithms can manage),you are not going to get a muted signal, you are going to get a discreet glitch in the playback. The same is true of the demagnetization and antistat of the CD! At least that is my understanding of digital music - either it is right or it is wrong - whereas analog is prone to being incrementally compromised, but not having a discreet discontinuity in the music like digital does.
Last thought:
I sincerely would not want to own a speaker that required me to play horrid sounds on them as a maintenance step before I could fully enjoy them!
There is just no snake oil and rigging here for many reasons…
First of all it doesn't work: These guys would be out of business in a month, if they sell something that does not work at home, word would get out quick and there would be no more sales.
Also the sale is not done before it is installed at home: Most guys here don't sell products but go home and make sure that what they do in shop is repeated at home where rigging and faking is impossible.
Seems like you have lots more bandits in US than here?????
My experience is that digital playback systems have a long way to go and …. I don't recall once listening to music through a streamer where I was 100% convinced it is genuine, there are just too many audible flaws with a digital playback chain from a streamer…. The grand piano is not really genuinely like a piano, artifacts in voices that should not be there and some symthetic artifacts that can be just plain annoying.
Without exception, the best music I heard was always through CD players and Vinyl, a CD player shpuld not be better than a streamer but somehow my best experiences have always been with physical media...
Theoretically doing cleanups in the digital domain should not make a difference, but what if it does and what if it can be proved with blind testing?
I am after the same as you guys… I just want good music and I don't want to break the bank in that process; I am doing my best to get there without throwing money out the window. If you look at my profile I believe you will see no snake oil products anywhere. I am very serious about what I do and if I do hear an audible difference with things I want to find out and see how I can apply this at home J
I also tried wool socks but I can't hear any audible difference