The point being that they are not missing in the typical listening room . . . wall reflections fill them in sufficiently. Often more than sufficiently.
Regardless the coefficients the vectors all fall between the left and right speakers, thus narrowing the image.
Then we're talking about a different things. Enveloping reflections are rather low frequency and >80ms (see Toole). How do you achieve that in a living room?
Can you prove that ?
Because I can prove the opposite.
Gerzon already did
http://decoy.iki.fi/dsound/ambisoni...for Multispeaker Stereo (TRIFIELD)_Gerzon.pdf
The delayed (late) reflections are already encoded in the recording. Their apparent direction (behind) is provided by listening room reflections.
He did what, actually ?
.
? Those "delayed (late) reflections [that] are already encoded in the recording" arrive at the listening postion from the front first. And they arrive from all other reflection points too. This isn't LEV.
One would need to extract those particular reflections from the recording and present them from the back. Unfortunately everything is lumped together into a 2 channel stereo signal. The spatial information is lost.
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He proved that the image doesn't become narrow by matrixing. He even proposes a "switch" to make the image narrower so it spans the standard ±30° stereo angle again.
Can you prove that ?
Because I can prove the opposite.
"It suggests that there is something that is happening in the real system that is not quite captured in the models."
"Envelopment" isn't about specific spatial information. That's a "localization" issue. There is no sense of "localization" of the reverberant field in a concert hall.
As I've said before, we're obviously talking about very different perceptions. Remove the back wall of a concert hall, record the sound that is "escaping" and mix it back in from the front ±30°. Do you really believe this creates the same perception of LEV as if the back wall was there?
Close enough . . . because the back wall of the listening room is there to reflect the sound from behind you. You don't need speakers back there for that (unless you have a VERY dead room, in which case if you have 'em smoke 'em). For some very dry recordings a little artificial reverb from the surrounds can sound . . . nice . . . and I can't say that I don't turn it on sometimes. But with most recordings it's just not necessary, or desirable.
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I will translate soon this article of friend of mine, will be interesting to discuss.
I will translate soon this article of friend of mine, will be interesting to discuss.
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