The interconversion between PCM and DSD is mathematically very convenient and lossless as the 2.8Mhz samling rate in DSD is just 64x that of the 44.1khz in PCM.
SACD REALLY BETTER THAN DVD-A TECHNICALLY!
For DVD-A & SACD higher (bitrate) formats are playable for 2 channels only! I've noticed that most DVD-A & SACD are old records (I mean most of them came from Analog recording) so no matter how good your record transfer format is, still limited to the original recording quality.
Anybody tried to compare identical album of different format lets say XRCD & SACD? (PCM & DSD)?
Ofcourse, the original analog Open REEL half-inch formats that mastered many recordings in the past, and still does in many titles, is the limiting factor in any transcirption or mastering to any format. Many on the net have opined that no analog system comes close to the 50khz bandwidth and 96db headroom of those analog professional open reel masters. If analog is superior to digital, it would have to be half-inch open reel, not LP. But the DSD, 20-bit, 24-bit, even 32-bit Open reel digital remastering have made these quintessential analog recordings not only forever reproduceable and made pristinely immortal on digital high resolution master, but are made readily accessible to the public more conveniently and faithfully than ever with the newer MLP and DSD-based formats. Many SACD mixes revisited quadraphonic open reel masters of many great classical performances of the 70s. Thus, some SACD titles only have 4 channels, not 5.1. (And there are many SACDs with only 2 channels, the early ones mostly.) These orginal tape reels are multichannel recordings themselves, often employing independent 8-track recordings. That is why mixing them down to 5.1 is often a breeze, rather than squeezimg them all into 2-channels. And that is why it was so easy taking out Nat King Cole's voice from one track of a 1950 reel tape to be mixed with Natalie Cole's in one of her recent albums to sound like a live duet.
And separating instruments so that the orchestra is at the back while the rhythm section is in front is made possible by such multi-track multi-channel recordings on open reels.
I have the CD of Grover Washington's Winelight album and the DVD-A transcription. It's almost unfair to compare between stereo and mulit-channel mixes of the same title on a well-made set-up. I am a happy stereo listener, as most of my collection are in stereo. But I must say the Multi-ch MIX is an entirely different listneing experience. The wide enveloping soundstage (180 degrees as I position the surround speakers to the sides, not the back) and the instrumental detailing is simply too awesome that after a bout with a excellent multi-channel mix, I simply have no compulsion to listen to the same material in plain stereo ever again. I cannot say multichannel is better, it's just one hell of a sonic experience. Having said that, given two choices of a title, one in stereo and the other in MC, I'd choose an MC. Same impression with the Fourplay DVD-A comparing just one track with another in CD format. Same with the Doobie Bros DVD-A Long Train Running track. Santana Abraxas DTS-CD and the Marvin Gaye DTS-CD. I can't wait for the lossless DTS format soon to become standard for HD-DVD and music HD-DVD (said to replace SACD and DVD-A). I've had goose-bumps with many excellent Telarc, Linn, Sony and Chesky releases in stereo CD, but the multi-channel experience is simply another thrilling ride altogether in this aural self-gratification hobby of ours. You simply must hear one, not on any HT set-up, but on a rig meant for high-res multichannel music.
With regards the stereo tracks on DVD-A, they do have higher resolution. But frankly speaking, whenever I plunk-in such formats, I go to multi-channel mode at once, rather than stereo mode. So I can't say if they sounded better than or so-so with ordinary CDs. Can't comment on HDCD and XRCD, though I'm sure they're better than ordinary CDs (that's their intention anyway).
And comparing between formats is not my preoccupation these days. Being new to the formats, I did. Not anymore. I really couldn't care less which format is better sounding. They all sound gorgeous to me. As long as I can get the titles that I want and play them to my aural satisfaction, that's enough. Whether stereo or multi-channel, I just grab which format is available that strikes my fancy.
I recently bought a couple of Patricia Barber SACDs. And they're both 2-channel mixes, no multi-ch track. Though I still have to get my hands on a really good SACD player. My time for this hobby is just too short to waste comparing formats, I just want to enjoy those that are readily enjoyable.