Densen audio technologies cd

I came across a cd a while back that purports to improve sq through demagnification. I have never put it into a device but its been laying here for a year or two. Anyone know anything about it. I googled it but didnt find any reliable info. B


https://www.ayre.com/products/accessories/ibe-disc/

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Yes. It looks like the same concept . I am curious if anyone has tried it… good or bad

I own the IBE disc but have never tried it. It has some useful tracks aside from the slow tone glide.

In particular, mono in-phase and out-of-phase brown tones are useful for speaker setup.

Yes. I get it. Thank you