o.k anybody know anything about shm-cd they claim there indistinguishable from the master?

CDs are digital. Digital is perfect. Has been since inception. Why would you even need to hear the actual sound? Can't you just look at the bitstream and see its identical? So of course they are indistinguishable. Duh. The question is, do they sound as good as old vintage vinyl?

By definition, SHM-CD (Super High Material CD) format features enhanced audio quality through the use of a special polycarbonate plastic. However they offer the same resolution (16bits/44.1kHz) as regular CD’s and sound exactly the same. There is no uptick in SQ with SHM-CD’s, atleast I couldn’t discern any difference in a direct comparison. To OP, they sound nothing like original master tapes.

IMHO, XRCD’s sounds markedly better than regular CD’s due to its painstaking mastering and manufacturing process. XRCD and SACD are the only reason I am still buying the discs.

I own a bunch of SHM CD’s and there is very little difference in sound between them and regular CD’s. However, I own “Paranoid” by Black Sabbath on a SHM SACD and the sound is truly something special.

I have a few SHM SACDs and in general, they sound a little hotter/brighter than other versions of the same material.  I'm sure they don't sound like the masters did.