SHM-CD format

compact disc, dacs, mp3 players and streaming audio
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Vinylfreak86
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SHM-CD format

Post by Vinylfreak86 » 14 Oct 2019 15:41

Did anyone try this japanese version pressed only by JVC in Japan? It sounds interesting, because CD is better made, but it doesn`t need special player (SACD), chip (HD version) or any separate decoder (high-res CD). Prices are from somewhere between 24-40 eur for an album.

http://www.cdjapan.co.jp/feature/shmcd_allabout

lenjack
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Re: SHM-CD format

Post by lenjack » 14 Oct 2019 16:09

There have been several versions of improved cds over the years, but I don't believe any of them have panned out, or that they have gotten past ABX testing.

Vinylfreak86
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Re: SHM-CD format

Post by Vinylfreak86 » 14 Oct 2019 16:17

But they didn`t survived like Blu-CD. This one survived, also CD is differently molded and made from material for LCD screens. Then for a long time we also have 24k gold CD`s, you can find them on classical music scene.

ravelax
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Re: SHM-CD format

Post by ravelax » 14 Oct 2019 19:22

It basically seems to be regular CDs made with better quality control. As stated on the site, they conform to the Red Book standard, thus making them perfectly regular Compact Discs and not some other format. Now, seeing past bullsh*t marketing lingo like "crystal clear sound" etc, there shouldn't be any audible difference on a properly working CD-player, but old worn ones that exhibit skipping behaviour on some discs may have an easier time reading these discs if they really have been manufactured with "more precise formation of pits".

It is important to note that there's no real audio signal coming out of the CD itself, only a datastream, which is converted to an audio signal by the DAC. Thus the claim that improved transparency of the plastic layer equals a cleaner audio signal is bordering on the fraudulent. Polycarbonate plastic isn't unique to these CDs, all CDs are made from it, though of course with this improved manufacturing process they may use a higher grade raw material. But regardless, since there's no actual audio waveform contained on the CD that can be distorted by a minute difference of clarity of the plastic layer, there shouldn't be any audible difference between one of these CDs and a regular one if played through a properly working CD-player, provided the same source material was encoded on both CDs. Because as long as the digital circuitry can distinguish between the ones and zeros pressed into the CD's surface, it should be capable of producing a perfectly clear (and identical compared to that of any other CD from the same source material) audio signal from the data on the CD.

CD pressing quality does differ and when it's really off it can affect play in the shape of skipping (the CD-player struggling to read the data from the disc). But as long as the data can be read without issue, any theoretical advantage of better quality materials should remain just that, theoretical rather than audible.

lenjack
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Re: SHM-CD format

Post by lenjack » 14 Oct 2019 21:11

Bits is bits. :!: :roll: :lol:

Vinylfreak86
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Re: SHM-CD format

Post by Vinylfreak86 » 14 Oct 2019 22:26

But Japs are still more than 80% on a CD`s and their regular CD releases are very good. So for their people they have to offer something new from time to time. Now they are also back with vinyl, but still tiny piece of a cake comparing to a CD production.

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