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7.1 Question?


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17 replies to this topic

#1 of 18 OFFLINE   Pete Bishop

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Posted June 21 2004 - 05:28 PM

If dvd's are being formatted for 5.1, then how does 7.1 work? Does the receiver try to create 7.1 from the 5.1 format? If thats the case then it isn't true 7.1 right?

#2 of 18 OFFLINE   Wes

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Posted June 21 2004 - 06:05 PM

Your right! Only dts has a true 6.1 and that is even processed to remove information out of the surround R/L when played in 6.1. Wes
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#3 of 18 OFFLINE   BrianWoerndle

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Posted June 22 2004 - 04:20 AM

My Denon 3803 gives me 3 options: Matrix ON: Even if the DVD is 5.1, it will use the DD-EX or DTS-ES decoder to matrix surround back speakers. It is just like using Pro-Logic in the rears. Matrix OFF: It copies the surround channels to the surround back speakers. Surround Back OFF. It plays in 5.1 only.
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#4 of 18 OFFLINE   ChrisWiggles

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Posted June 22 2004 - 06:36 AM

Yep. And no it's not true discrete 7.1. It's in the Primer and FAQ too, for more in-depth.

#5 of 18 OFFLINE   ChrisWiggles

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Posted June 22 2004 - 06:38 AM

this is also a good thread:

http://www.hometheat....postid=2020171

#6 of 18 OFFLINE   Pete Bishop

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Posted June 22 2004 - 09:40 AM

Thanks Chris. Now that strikes up a couple more questions. They are planning to have 7.1 format on DVD's in the future, right? Will my 7.1 receiver also do 6.1(Is it backward compatible for 6.1)?

#7 of 18 OFFLINE   Mike SJ

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Posted June 22 2004 - 10:03 AM

...

#8 of 18 OFFLINE   ChrisWiggles

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Posted June 22 2004 - 10:30 AM

Not to my knowledge. We will see with HD-DVD and the like, though. I'm sure there are better compression schemes and lossless high-res stuff in the works for that. Not sure how many channels it will support or anything. But for DVD at the moment we are limited to what the current DD and DTS provides.

#9 of 18 OFFLINE   Pete Bishop

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Posted June 21 2004 - 05:28 PM

If dvd's are being formatted for 5.1, then how does 7.1 work? Does the receiver try to create 7.1 from the 5.1 format? If thats the case then it isn't true 7.1 right?

#10 of 18 OFFLINE   Wes

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Posted June 21 2004 - 06:05 PM

Your right! Only dts has a true 6.1 and that is even processed to remove information out of the surround R/L when played in 6.1. Wes
My Theater Web Site:
www.prosteering.8k.com

#11 of 18 OFFLINE   BrianWoerndle

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Posted June 22 2004 - 04:20 AM

My Denon 3803 gives me 3 options: Matrix ON: Even if the DVD is 5.1, it will use the DD-EX or DTS-ES decoder to matrix surround back speakers. It is just like using Pro-Logic in the rears. Matrix OFF: It copies the surround channels to the surround back speakers. Surround Back OFF. It plays in 5.1 only.
The only way to safely double your money is to fold it over once and place it back in your pocket.

http://www.cube17576.com

#12 of 18 OFFLINE   ChrisWiggles

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Posted June 22 2004 - 06:36 AM

Yep. And no it's not true discrete 7.1. It's in the Primer and FAQ too, for more in-depth.

#13 of 18 OFFLINE   ChrisWiggles

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Posted June 22 2004 - 06:38 AM

this is also a good thread:

http://www.hometheat....postid=2020171

#14 of 18 OFFLINE   Pete Bishop

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Posted June 22 2004 - 09:40 AM

Thanks Chris. Now that strikes up a couple more questions. They are planning to have 7.1 format on DVD's in the future, right? Will my 7.1 receiver also do 6.1(Is it backward compatible for 6.1)?

#15 of 18 OFFLINE   Mike SJ

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Posted June 22 2004 - 10:03 AM

...

#16 of 18 OFFLINE   ChrisWiggles

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Posted June 22 2004 - 10:30 AM

Not to my knowledge. We will see with HD-DVD and the like, though. I'm sure there are better compression schemes and lossless high-res stuff in the works for that. Not sure how many channels it will support or anything. But for DVD at the moment we are limited to what the current DD and DTS provides.

#17 of 18 OFFLINE   Marty Neudel

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Posted June 25 2004 - 08:45 PM

>Only dts has a true 6.1< We're getting into the area of "true" and "discreet" debate. I think it's important to note that, while EX material does not have a discreet back channel, a properly mixed EX source will play back channel sounds through the back channel speakers. If you put your ear to a back channel speaker you may occasionally hear sounds that are not intended for the back channel. However, while watching your favorite films, sitting in your sweet spotted seat, (or even off to the sides, front, or back of the room), you will hear the soundtrack as it was intended to be heard. The simple fact is that you don't need infinite separation between channels to hear separate and individual channels (if you did, the stereo LP would never have come into existence). In other words, matrixing does work. Marty

#18 of 18 OFFLINE   Kevin C Brown

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Posted June 26 2004 - 09:27 AM

I wouldn't be surprised if at least the Dolby Digital folks do a discrete version of Dolby Digital EX for HD-DVD (to match DTS-ES discrete), but I was a betting man Posted Image, wouldn't surprise me at all to see them try to leapfrog them to 7.1 discrete. But who knows?

As far as DPL IIx and Logic 7 go, which right now are probably the 2 best ways of "expanding" a 5.1 soundtrack to 7.1 channels, most people do prefer 7.1 playback to 5.1 playback. But how the system and speakers are set up matters as well. A well done 5.1 system will beat a mediocre 7.1 setup every time. But by the same token, I believe that a well done 7.1 system will be preferred by most people over a well done 5.1 system too.
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