What am I listening to, it can't be Digital?

I've only got two Music DVD's so I'm not real smart about this stuff but my James Taylor "One Man Band", and Cowboy Junkies "Trinity Revisited" DVD's have set up menus to change modes from 5.1 surround to 2 channel stereo. Is it possible that the "set up" menu on your DVD is set to 2 ch stereo verses 5.1 surround? By the way, the "Trinity Revisited" DVD IMHO is amazing.

The effect you are hearing is the 24 bit high resolution content of DVD Audio. You are still hearing the stereo mix unless your headphone has separate five ear buds.

Dear Dave_b
Utilizing same Pioneer with Digital Co-axial out to Space Tech Lab DAC. Balanced Output from DAC to same said Space Tech Lab A-102 Vacuum Tube Integrated/Headphone Amp. Same set of Headphones with CD, sounds very-very-good. Still can't touch the sound of this DVD-Audio. Switch to this DVD-Audio puts at least a foot more Soundstage around the ears. Don't believe its the Headphones alone.
Dear Raks,
I'm not real smart about this stuff either, that is why I am trying to find out what it is that I am listening to. The Pioneer DV-58AV has two groups of Analog Out on the back. One group is AUDIO OUT (5.1ch) and includes all of the Channels for Surround Sound including the two front Channels. The other group is AUDIO OUT (2ch) which is utilized for two Channel Stereo. I am utilizing this last Output to my Stereo. To utilize 5.1 surround, my RCA Connectors would have to at least be hooked up to the 5.1 Audio Outputs. The AUDIO OUT (2ch) is separate from the 5.1 Channel Outputs. The Pioneer Menu allows one to select activation of either the AUDIO OUT (2ch) or the AUDIO OUT (5.1ch). Switching the Mode only activates the AUDIO OUT (5.1ch), 5.1 Surround can only be accessed from these Outlets, at least that is what the Manual says. The Manual does mention Downmixing of Multi-Channel DVD-Audio Discs to 2 Channel Stereo. I am still trying to figure out if this is accessed from the AUDIO OUT (2ch)-or- from the AUDIO OUT (5.1ch) Front Two Channels. The DVD-Audio Multi-Channel Disc also has to provide access for this 2 Channel downmix as well. The whole point is that what I am hearing sounds absolutely NOT like a Stereo Channels/Surround Channels Downmix. There is nothing Surroundish about it, the envelope of the Soundstage has tons of harmonic content, not delayed Surround Processing. Forward images have twice the intensity of presence, nothing like what I have ever heard on Surround Sound Systems. It may be a Downmix of Surround Channels, but the Surround Channels are loaded with musical harmonic content, not special effects. The Recording Studio might have decided to load the Surround Channels with harmonic musical content instead of the usual Surround Sound processed stuff. No matter what the cause, it sounds about as close to an Analog Record than any silver disc has a right to be.

Dear Jylee,
Already know that it isn't 5.1 Surround Sound, I am incapable of utilizing any of the AUDIO OUT (5.1ch) Outputs on the Pioneer. It might be possible that what I am hearing is two Channel 96kHz/24-bit, but double the presence, double the harmonic content, a foot wider Soundstage with Headphones? Do you have any two Channel 96kHz/24-bit recordings that do this? I have listened to 2-Channel SACD, and this blows it away. The problem is a Perfect Storm, three causes whose total is greater than the sum of their parts. Let me explain:
1. A Pioneer Manual that talks about a Players ability to
to take 4-Channel DVD-Audio and Downmix it to 2-Channel
Stereo.
2. A Player that doesn't indicate the presence of a 4-
Channel DVD-Audio or a Surround DVD-Audio. A Player that
further doesn't indicate when it is Downmixing or not.
3. A Disc Jacket for a DVD-Audio Disc that doesn't explain
that access to the Surround Channels is only available
through the use of external Surround Processing. A
simple disclaimer such as, "Downmixing of Surround
Channels to 2-Channel Stereo is not accessable on this
Disc".

Mental note to self: if a DVD-Audio Disc offers 4 Channels of Audio, but if two of these Channels are Surround Sound, then these Channels CANNOT be downmixed to 2-Channel Stereo. These Channels can only be accessed through external Surround Sound Processing. I think I got it! Well this should help avoid any further mistakes, and help me save some money!