2 channel SACD vs Multichannel SACD players...

Well here I go again, "....DVD-A 2-channel capability, where the stereo mixdown is done by the player using information provided on the disc by the recording engineer."

There is proprietary two channel information on a DVD-A disc?

I know there is always proprietary 2 channel info on SACD. I might add that, in a 2 channel only SACD player, it stands to reason you could get higher quality construction because of fewer channels. That should be fairly obvious.

Distortion...A two-channel program does not exist on a DVD-A, but instructions to the player regarding how to mix down the multichannel program into stereo are there. The DVD-A approach and the SACD approach accomplish the same thing in different ways. The DVD-A way doesn't use up as much data space on the disc, (for a complete 2-channel program) but requires a mixdown capability in the player.

Hardware for the three extra channels of a multichannel player cost almost nothing.

I don't know if I misunderstand what Eldaford is trying to say. But I tell you my "Fourplay" DVD-A disc has BOTH stereo and multi channel mode option and NOT just mulitchannel mixed down to stereo by my DVD player.

Eldartford, Thanks once again for the info. It wont be long before I upgrade my DVD/SACD player and this time I am going to look for one that offers DVD-A as well. I am really enjoying the multi-channel format as a change up from my normal 2 channel listening and I dont want to leave anything out.

Bonger...You use the word "mode" which indicates to me that you are configuring your player for stereo playback, and the player is doing the final mixdown. (Remember all recordings these days are mixdowns from dozens of tracks on the master. Stereo is the most mixed of all, except for mono if there are any). SCAD does have a separate area of the disc where the complete program is duplicated in stereo format, and this area is selected in a manner that resembles choice of the stereo DVD-A format, so it is easy to think that they both select a stereo program on the disc.

That said, the DVD-A protocol is very flexible, and I guess it would be possible to put a duplicate program on the disc a la SACD, but if so you have a very unique disc. DVD-A allows for 192 KHz sampling (instead of 96KHz) when the program is only stereo, but I have not seen any discs that are actually made in this way.

I do have some discs that are recorded on both sides, with a 2-channel Dolby program playable on DVD-V players on the backside.