HDCD Decoding ?


Recently, I have noticed that the specifications for CD players sometimes mention that they are compatible with HDCD CDs. I thought that HDCD died about ten years ago. But HDCD CDs have always been playable on any CD players; albeit not all CD players would decode the HDCD formatting because that required a special digital filter from Pacific Microsonics.

Several years ago, when HDCD first appeared, Pacific Microsonics required that anyone licensed to use their HDCD filter had to install automatic attenuation in their players for ALL non-HDCD discs. This was not necessarily a good thing.

When a 21st century CD player will read HDCD discs, it may or may not perform the automatic change in volume as a result. The net impact in older HDCD players was that all normal (non-HDCD) discs were attenuated. I own a few hundred CDs and only about 6 of them are HDCD. I expect that now in the year 2013, this is no longer a problem regarding the Pacific Microsonics HDCD filter. My guess is that current players are not using a Pacific Microsonics filter.

Perhaps "compatible with" is simply a reminder that the CD player will play the older HDCDs as regular CDs?

What says the group mind?
poetcatullus

Showing 2 responses by nsgarch

The biggest problem with HDCD enabled DAC's and CDP's is that the the PM chips are not that great sonically (sorry Poetcatullus) so much so that Mark Levinson (the brand) got special permission from PM to manufacture their own HDCD chips to incorporate in their players.

One non-PM solution for great sound from both Redbook and HDCD disks is (are) Wadia equipment. The reason is that Wadia's D to A processing is based on software decoding rather than 'brick-wall' filter chips. Therefore, all the information on a HDCD disk is read and fully processed (doesn't require the special PM chip) and HDCD's sound fantastic on Wadia equipment. Of course you don't get the little 'HDCD' indicator light on the front panel, but you can sure hear the difference!

So I was interested to hear about the 'attenuation' issue, because on my Wadia equipment, HDCD's sound louder if anything -- although that might just be a subjective response on my part to the improved quality of HDCD disks. I don't go out of my way to collect them, but I'm always thrilled when an artist/performer I like chooses to release their music on HDCD's. And some have been doing it for a long time (Chris Isaak comes to mind.) I know this is a bit off topic, but speaking of artists who seek to use interesting or sophisticated technology, I just discovered that quite a few of Lou Reed's earlier albums were recorded binaurally! The joke was definitely on me, because I've had those albums since they were released, and it never dawned on me until I was searching eBay for binaural recordings and they all came up!~
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Sonic, I know this isn't scientific, but what percentage of disks that indicate HDCD when played, would you say are unmarked 'HDCD' on the disk itself, or the case?

It's interesting to speculate why a performer would keep it a secret (especially Neil Young!) unless MS wanted an exorbitant fee to use the logo, and the performer figured 'screw you', my fans will find out on their own ;~)