What's SACD?
I don't quite understand your meaning of HD audio being the next step down Skuzzy (DvD HD maybe?), it don't make sence, but that's probabley the same reason why I got your pointed repsonce to my post, a missunderstanding (chill brotha, it's like you're mad at me or something still after last week after choosing to ignore my email responce about my little vacation
).
Digital audio recordings on a CD in
a file-format of 32-bit (or greater) and with a high sample rate is the best you can get (well, technicaly I think theres some 64-bits out there now, they were working on it last I heard anything about it in "the biz"... and IMHO if you notice the difference with your ears, go into the profession of safe cracking), but they do not conform to the established Red Book standard.
Standard audio Compact Disks (CDs) that are produced for an individual consumer's consumption and come with this* neat little logo we're all familiar with and must ocmply with the established Red Book industry standard (
http://en.wikipedia.org/wiki/Red_Book_(CD_standard) ).
*
If you buy a (Red Book-) standard audio CD then it must comply with 44.1/16.
I mentioned in a post yesterday that it is the same for DvDs, 44.1/16. I also mentioned in that same post that blue-ray is the best consumer-available audio quality on a CD format available today, at as you pointed out 192/32.
I was doing this stuff almost ten years ago for non-union independent production sound recording on entertainment productions here in LA and "Howwywood", before blue ray, our standard was we would record straight to a CD burning rig we had settup to *.wav format in stereophonic (x2) 11.025 Hz at 16-bit. At the time we were praised because CDs are cheap (compared to tape) and we would keep recording between takes and not hesitate to have the recorder running so we never missed a sound or line they wanted to use. For the cost of ten tapes we could provide 100s of CDs worth of raw audio.
So when I tpyicaly say a HD audio recording on a CD I mean it's a CD you created or aquired that has burned to it digital audio files of a standard format higher than that produced on the common established consumer CD media standards.
If I use the apropriate emoticon provided by Waffle on this bulletin board for our use at this point in my post, will I get another vacation?